Hebrews 6:6

 

 

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Hebrews  6:6 and then have fallen away, it is impossible to renew them again to repentance, since they again crucify to themselves the Son of God and put Him to open shame.  (NASB: Lockman)

Greek: kai parapesontas, (AAPMPA) palin anakainizein (PAN) eis metanoian, anastaurountas (PAPMPA) heautois ton huion tou theou kai paradeigmatizontas. (PAPMPA)
Amplified: If they then deviate from the faith and turn away from their allegiance—[it is impossible] to bring them back to repentance, for (because, while, as long as) they nail upon the cross the Son of God afresh [as far as they are concerned] and are holding [Him] up to contempt and shame and public disgrace.
(Amplified Bible - Lockman)
Barclay: and who then became apostates, for they are crucifying the Son of God again for themselves and are making a mocking show of him.  (Westminster Press)
ESV: if they then fall away, since they are crucifying once again the Son of God to their own harm and holding him up to contempt.  (
ESV)
KJV: If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
NET:  and then have committed apostasy, to renew them again to repentance, since they are crucifying the Son of God for themselves all over again and holding him up to contempt.
 (NET Bible)
NIV
: if they fall away, to be brought back to repentance, because to their loss they are crucifying the Son of God all over again and subjecting him to public disgrace. (
NIV - IBS)
NLT: and who then turn away from God. It is impossible to bring such people back to repentance; by rejecting the Son of God, they themselves are nailing him to the cross once again and holding him up to public shame. (
NLT - Tyndale House)
Phillips: and who then fall away, it proves impossible to make them repent as they did at first. For they are re-crucifying the Son of God in their own souls, and by their conduct exposing him to shame and contempt.  (
Phillips: Touchstone)
Wuest: and have fallen away, again to be renewing them to repentance, crucifying to themselves the Son of God and putting Him to an open shame. (
Erdmans
Weymouth: it is impossible, I say, to keep bringing them back to a new repentance, for, to their own undoing, they are repeatedly crucifying the Son of God afresh and exposing Him to open shame.
Young's Literal:  and having fallen away, again to renew them to reformation, having crucified again to themselves the Son of God, and exposed to public shame.

References

Albert Barnes
Brian Bell
John Calvin
Rich Cathers
Adam Clarke
Steven Cole
Thomas Constable
Bob DeWaay
Explore the Bible
Dan Fortner
Scott Grant
Dave Guzik
Hebrews Project
Matthew Henry
F B Hole
Jamieson, F, B
S Lewis Johnson
S Lewis Johnson
William Kelly
John MacArthur
John MacArthur
John MacArthur
Robert M'Cheyne
J Vernon McGee
F B Meyer
Phil Newton
Phil Newton
A W Pink
A W Pink
A W Pink
A W Pink
John Piper
A T Robertson
Gil Rugh
C H Spurgeon
C H Spurgeon
Ray Stedman
Ray Stedman
Ray Stedman
Today in the Word
Marvin Vincent
Drew Worthen
Drew Worthen
Precept Ministries

Hebrews 6
Hebrews 6:1-8
Hebrews 6
Hebrews 6:1-9
Hebrews 6
Hebrews 6:4-8 When Repentance Becomes Impossible

Hebrews 6
Hebrews 6:4-8 Can True Christians Commit Apostasy?
Hebrews 5:11-14; 6:1-12 Determine to Mature

Hebrews 6:4-20 If They Shall Fall Away
Hebrews 5:11-6:12 Chewing on Meat
Hebrews 6
Hebrews 6:4-8
Hebrews 6
Hebrews Commentary Notes
Hebrews 6
Hebrews 6:1-12 The Thing God Cannot Permit (audio)
Hebrews 6:1-12 Peril of Apostasy (audio)
Hebrews 1-6 Commentary
Hebrews 6:1-8 Tragedy of Rejecting Full Revelation-2

Hebrews 6:9-12 Tragedy of Rejecting Full Revelation-3

Hebrews 6:13-20 The Securities of God's Promise
Hebrews 6:4-6 Apostasy

Hebrews - 115 Mp3's Thru the Bible Commentary
Hebrews 6:4-6: Impossible to Renew to Repentance

Hebrews 6:1-8 Can a Believer Lose His Salvation? (1) 
Hebrews 6:1-8 Can a Believer Lose His Salvation? (2) 
Hebrews 6:4-6 Apostasy
Hebrews 6:4-6 Twofold Working of the Spirit
Hebrews 6:7, 8 Two Classes of Professors
Hebrews 6:9-11 Two Christians Described
Hebrews 6:4-8 When is saving repentance impossible?
Hebrews 6 Word Pictures
Hebrews 6:4-8 Once Enlightened
Hebrews 6:4-6 Final Perseverance
Hebrews 6 Exposition
Hebrews 6:1-20 Repentance Can Be Impossible!

Hebrews 5:11 - 6:12 Let's Get On with It
Hebrews 6:4-8 The Danger of Knowledge Without Faith
Hebrews 6:4-12;
Hebrews 6:4-20
Hebrews 6: Word Studies
Hebrews 6:4-6 Are We Really Secure In Christ?
Hebrews 6:7-12 Christ's Flock Will Persevere
Hebrews Inductive Study Pt 1; Part 2

AND THEN HAVE FALLEN AWAY: kai parapesontas (AAPMPA):

And then (2532) (kai) indicates connection to the prior passage, mostly as a simple continuative, marking the progress of a continued discourse. Kai does not mark the beginning of a conditional statement as is suggested by several translations that begin the sentence with "if". The King James translation, NIV and RSV have chosen to translate this passage with if but this is not an accurate rendering of the Greek text and is potentially misleading.

Fallen away (3895) (parapipto from pará = to side of or from + pípto= fall) means to fall aside or fall away. Figuratively it means to apostatize or to fall away from adherence to realities and facts of the true faith.

Contrast the writer's repetitive call for the readers to hold fast (See notes Hebrews 3:6, 3:14, 4:14, 10:23, Cp Hebrews 3:12-note)

From the context of the rest of Hebrews, those who fall away are not genuine believers.

John gives a parallel description in his first letter writing that...

They went out from us, but they were not really of us; for if they had been of us, they would have remained with us; but they went out, in order that it might be shown that they all are not of us. (1Jn 2:19)

How is it possible for one to experience all of the spiritual truths outlined in this section and yet not be regenerated? As discussed earlier, Judas Iscariot experienced Jesus Himself, God in the flesh and yet he was never born again.  Jesus even called him “devil” (Jn 6:70), “son of perdition” (Jn 17:12, and one for whom it “would be better… if he had not been born” (Mk 14:21). Jesus knew Judas’ condition from the beginning, though Judas fooled the disciples to the last!

Parapipto is used in the Septuagint (LXX) of the following passage...

Ezekiel 20:27 "Yet in this your fathers have blasphemed Me by acting treacherously against (LXX = parapipto) Me."

Note that the "falling away behavior" of Israel as described by Ezekiel had virtually the same impact as did the falling away in Hebrews 6:6; i.e., it resulted in Christ  being "put to open shame" which is similar to God being blasphemed in the OT.

IT IS IMPOSSIBLE: adunatos:

F B Hole (Biographical Note) notes that...

We may well ask if it is possible for anyone to share in this way without being truly converted; and this question may well be specially urgent as regards the third of the five. Can it be possible to be a partaker of the Holy Ghost" without being born again?

The answer to that question is, that it is quite possible. Only a true believer can be indwelt by the Holy Spirit, but all within the circle of Christian profession, whether truly converted or not, partake or share in the benefits of the presence of the Spirit. A man may be enlightened without being saved. He may taste the heavenly gift without receiving it. He may taste the good word of God without digesting it in his inward parts. He may share in "the powers of the world to come." (i.e. miraculous powers) without experiencing the real power of the world to come.

The terrible case of Judas Iscariot furnishes us with an illustration of this very thing. He walked for over three years in the company of the Son of God. What floods of light fell upon his path! What tastes he had of the heavenly gift and of the good Word of God! It could not be said of course that he was a partaker of the Holy Ghost, but he was a partaker of the benefits of the presence of Christ upon earth; and he shared, in common with the other apostles, in those miraculous powers which are here called "the powers of the world to come." He was one of the twelve to whom the Lord gave power over unclean spirits, and of whom it is said, "They cast out many devils and anointed with oil many that were sick, and healed them." (Mark 6:13). Yet the miracle-working Judas was all the while a "son of perdition" and not a saved man at all. He fell away and it proved impossible to renew him unto repentance.

You will notice that the word here, is "impossible" and not "improbable." This one word is quite sufficient to show that there is no support in this scripture for the idea of a true believer falling away and being lost for ever. ALL those who "fall away" in the sense spoken of in this passage are for ever lost. It is not that they may be, but that they must be; and there would not be a single ray of hope for any back-slider, did it refer to such.

It refers then to the sin of apostasy — a sin to which the Jew, who embraced the Christian religion without being really converted, was peculiarly liable. By turning back to his ancient and worn out religion, thereby utterly condemning and disowning the Lord Jesus, he proved himself to be utterly bad and worthless ground.  (
Hebrews Commentary Notes)

Impossible (102) (adunatos from a = without + dunatós = possible, able, or powerful from dunamai = to be able or have power by virtue of inherent ability and resources. Note the stem duna- or dyna- conveying the basic sense of ability or capability, power, strength, might) means impossible, incapable of being or of occurring, incapable of being done. Adunatos is used twice to convey the idea of one who is impotent, has no strength or lacks capability in functioning adequately, once in a literal sense (Acts 14:8 below  = powerless) and once in a spiritual sense (Romans 15:1 = of those who do not "strongly" believe).

Note that adunatos is not present in this verse in the Greek but is found in Hebrews 6:4 where it is place first in the Greek sentence for emphasis. It's as if the author wants to make it blazingly, blatantly clear...."Impossible it is..."! One can hardly miss his point. In regard to man’s moral offense, there is no "permanent cure" effected by the physical blood of animals.

There are 26 uses in the Septuagint (LXX) (Job 5:15, 16; 20:19; 24:4, 6, 22; 29:16; 30:25; 31:16, 20, 34; 34:20; 36:15, 19; Pr 30:18; Joel 3:10) and 10 uses in the NT. Note the obvious concentration of "impossibilities" in the book of Hebrews!

Matthew 19:26 And looking upon them Jesus said to them, "With men this is impossible, but with God all things are possible."

Mark 10:27 Looking upon them, Jesus said, "With men it is impossible, but not with God; for all things are possible with God."

Luke 18:27 But He said, "The things impossible with men are possible with God."

Acts 14:8 And at Lystra there was sitting a certain man, without strength in his feet, lame from his mother's womb, who had never walked.

Romans 8:3 For what the Law could not do (adunatos), weak as it was through the flesh, God did: sending His own Son in the likeness of sinful flesh and as an offering for sin, He condemned sin in the flesh (Comment: The truth in Romans parallels that in Hebrews 10, Romans dealing with the Law per se and Hebrews addressing the Levitical sacrificial system. Neither source had the inherent ability to make man right before the Holy God and both point ultimately to the Son, the perfect Sacrifice and the fulfillment of the Law!)

Romans 15:1 Now we who are strong ought to bear the weaknesses of those without strength and not just please ourselves.

Hebrews 6:4 (ESV) For it is impossible to restore again to repentance those who have once been enlightened, who have tasted the heavenly gift, and have shared in the Holy Spirit, (Note:  the NASB places "impossible" in Hebrews 6:6) (Note also that commentators and some translators take adunatos to mean "difficult" but clearly from the other NT uses and specifically the uses in Hebrews this is inappropriate and leads to a thoroughly incorrect interpretation of this stern warning passage.)

Hebrews 6:18  in order that by two unchangeable things, in which it is impossible for God to lie, we may have strong encouragement, we who have fled for refuge in laying hold of the hope set before us.

Hebrews 10:4 For it is impossible for the blood of bulls and goats to take away sins.

Hebrews 11:6 And without faith it is impossible to please Him, for he who comes to God must believe that He is, and that He is a rewarder of those who seek Him.

Some compare this verse with the blasphemy of the Holy Spirit Jesus referred to in Mt 12:31,32. For example, John Calvin espouses this view but still thinks they are believers!

Some translate adunatos (impossible) with the English word “difficult.”, something that is difficult to do if one adheres to normal rules of Biblical interpretation (hermeneutics). Specifically as noted above every other use of adunatos translated impossible! Thus it is clear from these other passages that such a translation is unjustified.

Expositor's Bible Commentary remarks that the writer may be...

talking about what looks very much like the real thing but lacks something. The case of Simon Magus springs to mind. He is said to have believed, to have been baptized, and to have continued with Philip (Acts 8:13). Presumably he shared in the laying on of hands and the gift given by it. Yet after all this Peter could say to him, "Your heart is not right before God.…you are full of bitterness and captive to sin" (Acts 8:21, 22, 23). The writer is saying that when people have entered into the Christian experience far enough to know what it is all about and have then turned away, then, as far as they themselves are concerned, they are crucifying Christ. In that state they cannot repent. (For a good discussion of the various interpretations, see Kent, in loc.) (Gaebelein, F, Editor: Expositor's Bible Commentary 6-Volume New Testament. Zondervan Publishing)

A good illustration of the impossibility of renewing such a person to repentance is found in Hebrews 12 where the writer reminds his Jewish audience (and all of us) of the tragic example of Esau, warning them to....

See to it (keep on the lookout continually) that no one comes short of the grace of God; that no root of bitterness springing up causes trouble, and by it many be defiled (contaminated, polluted, tainted); 16 that there be no immoral or godless person like Esau, who sold his own birthright for a single meal. 17 For you know that even afterwards, when he desired to inherit the blessing, he was rejected, for he found no place for repentance, though he sought for it with tears. (see notes Hebrews 12:15; 16; 17)

The writer is saying that  Esau could no longer repent because he had become so hardened (see notes Hebrews 3:8, 3:15, 4:7). Yes, he cried out for things to go better in his life but all the while inside he was refusing to submit to God's terms! Isn't there some of Esau in all of us?...for every time we willfully sin, we reject God's terms, God's sovereign will & good pleasure. Impossible to repent is a terrifying prospect behind all the warnings of Hebrews -- don't drift but take heed and consider Jesus and exhort one another daily and fear unbelief and carelessness. Why? Is anything really at stake? The prospect exists that you and I who believe we are chosen and called and justified might slide into a slow process of indifference (like allowing the "little foxes" in into our garden - Song 2:15) and gradually hardening our hearts so that eventually we fall away, reject Christ and put Him to open shame! We may actually come to the point of no return, because we have been forsaken utterly by God. That is the "impossible" of this verse!

The Effect of Vaccination

As a physician sub-specialized in infectious diseases, I know full well the benefit of vaccinations to prevent infection with various microbial agents. A vaccination immunizes by giving the patient a "very mild case" of the disease (in a manner of speaking). Instead of using live viral agents, the vaccine uses an attenuated virus that is strong enough to stimulate the body's immune system to produce antibodies which in turn will be called upon to protect the body should that individual ever be exposed to the live infectious agent. Vaccination is good in Medicine but bad in Theology! A person who is exposed to the gospel can get just enough of it to be immunized against the real thing. The longer one resists the real thing, the more they become "immunized". The spiritual system so to speak, like their physical immune system,  becomes more and more "protected" against the true gospel. Their only hope is to reject what he is holding onto and receive Christ without delay lest he become so hardened, often without even realizing his gradually hardening state, that his opportunity is forever gone.

These "vaccinated" individuals who think they are protected from eternal destruction by a profession of faith without fruit to validate genuine possession are like the vulture who spotted the corpse of a fox on an ice floe lazily moving with the current down the river toward Niagara Falls. The unwary carnivore alights on the ice and begins to eat remains of the carcass. Then he hears the crashing of water, warning of approaching danger, but he reasons that he has wings and need not pay attention to these obvious warnings for he is free to fly away at any time. And then at the last minute he finishes his feast and spreads his wings for lift off, but lo, he is unable to fly away because his talons have become frozen and firmly fixed into ice floe and he is dragged over the falls to destruction!

 TO RENEW THEM AGAIN TO REPENTANCE: palin anakainizein (PAN) eis metanoian:
(Heb 6:4; Ps 51:10; Isaiah 1:28; 2Ti 2:25-note)

Note that contrary to what Arminianism teaches, it is the opportunity for receiving salvation, not salvation itself, that can be lost.

The writer seems to express in this section his fear that there may be some among his readers (see
Group 2) who profess to be believers in Messiah, perhaps even having witnessed for Him, participated in church, etc (cf Jesus' words in Matthew 7:21-note; Mt 7:22-note; Mt 7:23-note) and yet have never experienced true repentance and salvation. Turning back from the light they have been given, they prove themselves to be enemies of Christ and not a part of the people of God at all!

Wuest comments on the translation of the words impossible and renew noting that...

The Greek word translated impossible cannot be diluted to mean difficult. The same word is used in Hebrews 6:18; Heb 10:4, and Heb 11:6, where it can only mean “impossible.” Likewise, the word renew must be taken in its full force. Expositor’s Greek Testament says that it means that those who have once experienced a renewal cannot again have a like experience. The person described cannot again be brought to a life-changing repentance. Repentance is a work of the Holy Spirit on the heart of the one who is approaching the act of faith in Christ. It is usually involved in that act, but can also exist separate and apart from it, as is seen in the present instance. These Hebrews had allowed the Holy Spirit to carry them along to the place of repentance. Now should they refuse the proffered faith by which they could lay hold of the High Priest as their Saviour, and return to the abrogated sacrifices of the First Testament, it would be impossible to bring them back to the act of repentance again. And as we have seen, the impossibility would inhere in their own spiritual condition, not in the grace of God. (Wuest, K. S. Wuest's Word Studies from the Greek New Testament: Eerdmans or Logos)

Wayne Grudem has this note on Hebrews 6:4-6 writing that...

the persons who “commit apostasy” have had all sorts of knowledge and conviction of the truth: they have “been enlightened” and have “tasted the heavenly gift”; they have participated in some ways in the work of the Holy Spirit and “have tasted the goodness of the word of God and the powers of the age to come,” yet they then willfully turn away from Christ and “hold him up to contempt” (Heb. 6:6). They too have put themselves beyond the reach of God’s ordinary means of bringing people to repentance and faith. Knowing and being convinced of the truth, they willfully reject it. (Grudem, W: Systematic Theology: An Introduction to Biblical Doctrine. IVP; Zondervan, 1994 or Logos = Highly Recommended resource!)

Renew (340) (anakainizo from aná = again + kainízo = renew <> kainos= qualitatively new) means to have a new, qualitatively different repentance.

Again (3825) (palin) refers to a subsequent point of time involving repetition.

Repentance (3341)(metanoia from meta = after + noéo = to understand) literally means "afterthought" or "to think after" and implies a change of mind. From the NT uses, it is clear that metanoia means however much more than merely a change of one's mind but also includes a complete change of heart attitude, of interest, and of the general direction of one's life. True repentance represents a "conversion" in every sense of the word.

Jesus' teaching supports the inseparable association of repentance and salvation, our Lord declaring...

"I tell you that in the same way, there will be more joy in heaven over one sinner who repents (metanoeo), than over ninety-nine righteous persons who need no repentance (metanoia)."   (Luke 15:7)

It should be stated at the outset that there are some in evangelical circles who teach that all repentance involves is a change of mind. The problem with this definition is that it has nothing to do with one’s attitude toward sin and does not necessarily result in any change in lifestyle. Keeping this "definition" of repentance in mind now read the first NT use of metanoia by John the Baptist as he addresses the most religious people in Israel, who themselves were seeking to flee from the wrath to come (referring to God's ultimate judgment on sin and sinners who refuse to repent)...

Therefore bring forth (aorist imperative = do it and do it now! It can convey a sense of urgency) fruit (karpos - fruit is what people produce that other people see and which indicates their true spiritual condition - see Matthew 7:16, 17, 18, 19, 20ff-notes notes) in keeping (axios = the idea is that of having equal weight or worth, and therefore of being appropriate) with repentance." (Matthew 3:8) (Note Jesus began His ministry with exactly the same call in Mt 4:16)

Was John the Baptist calling for simply a change in thinking or is he calling for a change in thinking that was evidenced by a change in behavior? What does the passage teach? John was issuing a call to repentance that was evidenced by an inner change and an outward act commensurate with and proof of the genuineness of the change (possession and not just profession).

As a corollary, note that the New Testament knows nothing of a gospel that lacks a call to repentance.  John and Jesus were both calling Israel to have a radical change in thinking about genuine righteousness and how it was worked out in one's everyday life. The Scribes and Pharisees taught the Jews a distorted, perverted, external type of righteousness, a self-righteousness based on an adherence to manmade rules and regulations (613 of them in fact!), the keeping of which would emphatically not guarantee one's entrance into the Kingdom of Heaven. Jesus presented the Sermon on the Mount to correct this deadly distortion of the Law and the Prophets (the entire Old Testament) by the religious leaders. (See Overview of Matthew 1-7) and commentary on Matthew 5-7 beginning in Matthew 5:1-2).

In summary, the Jews needed to have a change (repentance) in regard to righteousness for as Jesus emphatically declared...

unless your righteousness surpasses that of the scribes and Pharisees, you shall not enter the kingdom of heaven. (see notes Mt 5:20)

J. R. Miller wrote that genuine repentance

amounts to nothing whatever if it produces only a few tears, a spasm of regret, a little fright. We must leave the sins we repent of and walk in the new, clean ways of holiness.

Marvin Vincent in his note on the verb form (metanoeo) writes that this is...

A word compounded of the preposition meta, after, with; and the verb noeo, to perceive, and to think, as the result of perceiving or observing. In this compound the preposition combines the two meanings of time and change, which may be denoted by after and different; so that the whole compound means to think differently after.

Metanoia (repentance) is therefore, primarily, an after-thought, different from the former thought; then, a change of mind which issues in regret and in change of conduct. These latter ideas, however, have been imported into the word by scriptural usage, and do not lie in it etymologically nor by primary usage.

 Repentance, then, has been rightly defined as

“Such a virtuous alteration of the mind and purpose as begets a like virtuous change in the life and practice.”

Sorrow is not, as is popularly conceived, the primary nor the prominent notion of the word. Paul distinguishes between sorrow and repentance (metanoia), and puts the one as the outcome of the other. “Godly sorrow worketh repentance” (2Cor 7:10). (Vincent, M. R. Word Studies in the New Testament. Vol. 1, Page 3-23) (Bolding added)

Kenneth Wuest (in his discussion of the related verb) adds that...

Repent is the translation of metanoeo which in classical Greek meant “to change one’s mind or purpose, to change one’s opinion.” The noun metanoia meant “a change of mind on reflection.” These two words used in classical Greek signified a change of mind regarding anything, but when brought over into the New Testament, their usage is limited to a change of mind in the religious sphere. They refer there to a change of moral thought and reflection which follows moral delinquency. This includes not only the act of changing one’s attitude towards and opinion of sin but also that of forsaking it. Sorrow and contrition with respect to sin, are included in the Bible idea of repentance, but these follow and are consequent upon the sinner’s change of mind with respect to it." (Wuest, K. S. Wuest's Word Studies from the Greek New Testament: Studies in the Vocabulary of the Greek New Testament: Grand Rapids: Eerdmans)  (Bolding added)

Thayer writes that metanoia refers

especially (to) the change of mind of those who have begun to abhor their errors and misdeeds, and have determined to enter upon a better course of life, so that it embraces both a recognition of sin and sorrow for it and hearty amendment, the tokens and effects of which are good deeds.

Friberg, et al, define metanoia as...

"(1) religiously and morally, a change of mind leading to change of behavior repentance, conversion, turning about ; (2) as a change of opinion in respect to one’s acts regret, remorse (a popular Greek usage not found in the NT)" (Friberg, T., Friberg, B., & Miller, N. F. Analytical Lexicon of the Greek New Testament. Baker's Greek New Testament library. Baker Academic) (Bolding added)

Louw and Nida define metanoia as a...

"to change one’s way of life as the result of a complete change of thought and attitude with regard to sin and righteousness...Though in English a focal component of repent is the sorrow or contrition that a person experiences because of sin, the emphasis in metanoeo (verb form) and metanoia seems to be more specifically the total change, both in thought and behavior, with respect to how one should both think and act. Whether the focus is upon attitude or behavior varies somewhat in different contexts." (Louw, J. P., & Nida, E. A. Greek-English Lexicon of the New Testament: Based on Semantic Domains. United Bible societies ) (Bolding added)

Repentance as used by is a change of mind that results in a change of will. It means “a turn about" or deliberate change of mind resulting in a change of direction in thought and behavior. There is a new attitude to God, to men, to life, to self.

One might thus say that repentance is a change of attitude toward sin which leads to a desire to change our behavior accordingly. If the sinner honestly changes his mind about sin, he will turn from it. If he sincerely changes his mind about Jesus Christ, he will turn to Him, trust Him, and be saved. In Paul's parting words to the Ephesian elders he declared...

“how I did not shrink from declaring to you anything that was profitable, and teaching you publicly and from house to house, solemnly testifying to both Jews and Greeks of repentance (metanoia) toward God and faith in our Lord Jesus Christ. (Acts 20:21)

True repentance is a godly sorrow for sin, an internal repugnance to the ugliness of sin followed by the actual forsaking of it as Paul explained to the Corinthians...

"I now rejoice, not that you were made sorrowful, but that you were made sorrowful to the point of repentance (i.e., their sorrow led them to a change of mind resulting in a change of life); for you were made sorrowful according to the will of God, in order that you might not suffer loss in anything through us. For the sorrow that is according to the will of God (godly sorrow is a grief which comes into a one's life after he or she has committed a sin and which leads to repentance) produces a repentance without regret, leading to salvation; but the sorrow of the world produces death." (2Corinthians 7:9-10)

In his respected commentary on 2Corinthians 7:9-10 Charles Hodge  writes that

"Repentance is not merely a change of purpose, but includes a change of heart which leads to a turning from sin with grief and hatred thereof unto God.”

Jameison, et al, commenting on  2Corinthians 7:9-10 write that...

Repentance” (metanoia) implies a coming to a right mind; “regret” implies merely uneasiness of feeling at the past or present, and is applied even to the remorse of Judas (Mt 27:3); so that, though always accompanying repentance, it is not always accompanied by repentance. “Repentance” removes the impediments in the way of “salvation” (to which “death,” namely, of the soul, is opposed)." (Jamieson, R., Fausset, A. R. & Brown, D.  A Commentary, Critical and Explanatory, on the Old and New Testaments)

Do not confuse remorse with repentance. For example

"when Judas, who had betrayed (Jesus), saw that He had been condemned, he felt remorse and returned the thirty pieces of silver to the chief priests and elders" (Matthew 27:3)

What is the distinction? Repentance involves sorrow for the act of sin, remorse sorrow for its consequences. A repentant person is sorry he sinned, whereas a remorseful person is sorry he got caught.

SINCE THEY AGAIN CRUCIFY TO THEMSELVES THE SON OF GOD AND PUT HIM TO OPEN SHAME: anastaurountas (PAPMPA) heautois ton huion tou Theou kai paradeigmatizontas (PAPMPA): (Heb 10:29; Zechariah 12:10, 11, 12, 13, 14; Matthew 23:31,32; Luke 11:48) (Heb 12:2; Mt 27:38, 29, 30-44; Mark 15:29, 30, 31,32; Luke 23:35, 36, 37, 38, 39)

Again crucify (388) (anastauroo from aná = again or up + stauróo = crucify)  means to crucify afresh.

Crucify conveys a picture of a person making a deliberate, malicious decision to continually spurn Christ, not just to carelessly disregard Him. The voice is active which indicates a personally initiated active betrayal of Christ! This person is in essence in that throng of Jews who screamed to Pilate "Crucify, Crucify". (Jn 19:6, cp Acts 2:23 where "you" = Jews)

To themselves - This means that, as far as they were concerned, the Son of God deserved to be crucified. Regardless of what they may have been professing openly and publicly, they now took their stand with the crucifiers. In their hearts they said, “That’s the verdict we give - Crucify Him!” and put Him to open shame again. (see notes Hebrews 12:2)

Note that the NIV has a poor translation  rendering it "because to their loss".

MacDonald writes that...

This signifies a deliberate, malicious spurning of Christ, not just a careless disregard of Him. It indicates a positive betrayal of Him, a joining of forces against Him, and a ridiculing of His Person and work.

Stedman agrees writing that

The NIV because to their loss does not translate the Greek heautois (themselves) well. “To themselves” (KJV) or “on their own account” (RSV) is better. That is, they fall away deliberately, unwilling to separate themselves from those who actually condemned Jesus to be crucified. Their hearts are hardened in flint like determination to have things their own rebellious way. (Hebrews 6:4-8 The Danger of Knowledge Without Faith)

Vincent remarks on the pronoun heautois writing that it means...

for themselves. So that Christ is no more available for them. They declare that Christ’s crucifixion has not the meaning or the virtue which they formerly attached to it. The Son of God. Marking the enormity of the offence.  (Hebrews 6: Word Studies)

Put to open shame (3856) (paradeigmatizo from pará = near, to those in view, visibly, openly, publicly + deigmatízo = exhibit, make a show, cause to suffer public disgrace or shame -- as the Romans did when they exposed their captives and the spoils of the conquered enemies to public view in their triumphal processions) means to put something alongside of a thing by way of commending it to imitation or avoidance. To show to point out. To make an example of and thus to expose to public disgrace. Paradeigmatizo implies exposing to ignominy or infamy, such as was effected in barbarous times by exposing the quarters of the executed criminal, or leaving him hanging in chains. Archilochus, says Plutarch, rendered himself infamous (paradeigmatizo) by writing obscene verses. In other words he put himself to open shame.

Matthew uses the root verb deigmatizo describing Joseph's reaction upon discovering Mary was pregnant...

And Joseph her husband, being a righteous man, and not wanting to disgrace her, desired to put her away secretly. (Mt 1:19 )

The Septuagint (LXX) uses paradeigmatizo in Numbers 25 where Israel was playing the harlot, sacrificing to the idols of the pagans. Moses records that...

the LORD said to Moses, "Take all the leaders of the people and execute them in broad daylight (LXX = paradeigmatizo = setting them forth as an example for the Lord in the face of the sun) before the LORD, so that the fierce anger of the LORD may turn away from Israel. (Nu 25:4)

Some translators (see Amplified above) take the participles "crucify...put to open shame" in a temporal sense rather than a causal sense, and translate the verse something like this...

“it is impossible to bring them back again to repentance while they are crucifying....”

This translation would result in a change in interpretation (which is why you want to read either the original Greek or use a translation that is literal and closest to the Greek), the idea being that while they are "crucifying" Jesus they cannot repent, but maybe they will come to a point when they cease "crucifying" Him with the implication that then they can repent. Such an interpretation would be desirable if one interpreted Hebrews 6:4, 5 as referring to a born again believers and they did not believe a true believer could lose his salvation. By translating it with the time word while, they leave the door open for the believer who has fallen away.  They have a hard time rationalizing a true believer reaching a point in his falling away when he would never be able to repent and would continually (crucify  = present tense) for the rest of his life in essence reject (deny) Christ. So they try to "soften" the falling away, suggesting it is only for a period of time, not for the rest of the person's life. This seems to be straining the meaning of the text and softening the severity of the author's strong warning.

Note both verbs (crucify...put to open shame) are in the
present tense which pictures habitual action. This is not a one time slip up but reflects a continuing attitude of their heart. So in the case of those falling away, they actively and continually crucify the Messiah and put Him to open shame. What happens to a sinner who experiences a spiritual rebirth under the New Covenant...

"Moreover, I will give you a new heart and put a new spirit within you; and I will remove the heart of stone from your flesh and give you a heart of flesh. And I will put My Spirit within you and cause you to walk in My statutes, and you will be careful to observe My ordinances" (Ezekiel 36:26, 27)

It is very difficult to imagine a truly born again individual who possesses a brand new heart and spirit (and motivating "force" - the indwelling Spirit) habitually carrying out these heinous attitudes and "actions" for the remainder of their life...and still believe that they are truly saved! Certainly this is not what Heb 3:6,14 described as a sign of a true believer.

but Christ was faithful as a Son over His house whose house we are, if we hold fast our confidence and the boast of our hope firm until the end. (see note Hebrews 3:6)

For we have become partakers of Christ, if we hold fast the beginning of our assurance firm until the end (see note Hebrews 3:14)

True believers hold fast to the end, not because of their strength but because of the One Who holds them. Holding fast does not earn salvation but proves they are genuinely saved. In fact Jesus clearly states that if one denies Him, He will deny them before the Father. (Mt 10:33; Mk 8:38, Lu 12:9, 2Ti 2:12-