Hebrews 6:6
Then he adds, “and have tasted of the heavenly gift. If you have tasted” (he says) “of the heavenly gift,” that is, of forgiveness. “And been made partakers of the Holy Ghost, and tasted the good word of God” (he is speaking here of the doctrine) “and the powers of the world to come” (what powers is he speaking of? Either the working of miracles, or “the earnest of the Spirit”) “and have fallen away, to renew them again unto repentance, seeing they crucify to themselves the Son of God afresh and put Him to an open shame.” “Renew them,” he says, “unto repentance,” that is, by repentance, for unto repentance is by repentance. What then, is repentance excluded? Not repentance, far from it! But the renewing again by the laver. For he did not say, “impossible” to be renewed “unto repentance,” and stop, but added how “impossible, [by] crucifying afresh.”
To “be renewed,” that is, to be made new, for to make men new is [the work] of the laver only: for (it is said) “your youth shall be renewed as the eagle's.” But it is [the work of] repentance, when those who have been made new, have afterwards become old through sins, to set them free from this old age, and to make them strong. To bring them to that former brightness however, is not possible; for there the whole was Grace.
6. “Crucifying to themselves,” he says, “the Son of God afresh, and putting Him to an open shame.” What he means is this. Baptism is a Cross, and “our old man was crucified with [Him]”, for we were “made conformable to the likeness of His death”, and again, “we were buried therefore with Him by baptism into death.” Wherefore, as it is not possible that Christ should be crucified a second time, for that is to “put Him to an open shame.” For “if death shall no more have dominion over Him”, if He rose again, by His resurrection becoming superior to death; if by death He wrestled with and overcame death, and then is crucified again, all those things become a fable and a mockery. He then that baptizes a second time, crucifies Him again.
But what is “crucifying afresh”? [It is] crucifying over again. For as Christ died on the cross, so do we in baptism, not as to the flesh, but as to sin. Behold two deaths. He died as to the flesh; in our case the old man was buried, and the new man arose, made conformable to the likeness of His death. If therefore it is necessary to be baptized [again], it is necessary that this same [Christ] should die again. For baptism is nothing else than the putting to death of the baptized, and his rising again.
And he well said, “crucifying afresh unto themselves.” For he that does this, as having forgotten the former grace, and ordering his own life carelessly, acts in all respects as if there were another baptism. It behooves us therefore to take heed and to make ourselves safe.
7. What is, “having tasted of the heavenly gift”? It is, “of the remission of sins”: for this is of God alone to bestow, and the grace is a grace once for all. “What then? Shall we continue in sin that grace may abound? Far from it!” But if we should be always going to be saved by grace we shall never be good. For where there is but one grace, and we are yet so indolent, should we then cease sinning if we knew that it is possible again to have our sins washed away? For my part I think not.
He here shows that the gifts are many: and to explain it, You were counted worthy (he says) of so great forgiveness; for he that was sitting in darkness, he that was at enmity, he that was at open war, that was alienated, that was hated of God, that was lost, he having been suddenly enlightened, counted worthy of the Spirit, of the heavenly gift, of adoption as a son, of the kingdom of heaven, of those other good things, the unspeakable mysteries; and who does not even thus become better, but while indeed worthy of perdition, obtained salvation and honor, as if he had successfully accomplished great things; how could he be again baptized?
On two grounds then he said that the thing was impossible, and he put the stronger last: first, because he who has been deemed worthy of such [blessings], and who has betrayed all that was granted to him, is not worthy to be again renewed; neither is it possible that [Christ] should again be crucified afresh: for this is to “put Him to an open shame.”
There is not then any second laver: there is not [indeed]. And if there is, there is also a third, and a fourth; for the former one is continually disannulled by the later, and this continually by another, and so on without end.
“And tasted,” he says, “the good word of God”; and he does not unfold it; “and the powers of the world to come,” for to live as Angels and to have no need of earthly things, to know that this is the means of our introduction to the enjoyment of the worlds to come; this may we learn through the Spirit, and enter into those sacred recesses.
What are “the powers of the world to come”? Life eternal, angelic conversation. Of these we have already received the earnest through our Faith from the Spirit. Tell me then, if after having been introduced into a palace, and entrusted with all things therein, you had then betrayed all, would you have been entrusted with them again?
8. What then (you say)? Is there no repentance? There is repentance, but there is no second baptism: but repentance there is, and it has great force, and is able to set free from the burden of his sins, if he will, even him that has been baptized much in sins, and to establish in safety him who is in danger, even though he should have come unto the very depth of wickedness. And this is evident from many places. “For,” says one, “does not he that falls rise again? Or he that turns away, does not he turn back to [God]?” It is possible, if we will, that Christ should be formed in us again: for hear Paul saying, “My little children of whom I travail in birth again, until Christ be formed in you.” Only let us lay hold on repentance.
For behold the love of God to man! We ought on every ground to have been punished at the first; in that having received the natural law, and enjoyed innumerable blessings, we have not acknowledged our Master, and have lived an unclean life. Yet He not only has not punished us, but has even made us partakers of countless blessings, just as if we had accomplished great things. Again we fell away, and not even so does He punish us, but has given medicine of repentance, which is sufficient to put away and blot out all our sins; only if we knew the nature of the medicine, and how we ought to apply it.
What then is the medicine of Repentance and how is it made up? First, of the condemnation of our own sins; “For” (it is said) “mine iniquity have I not hid”; and again, “I will confess against myself my lawlessness unto the Lord, and Thou forgavest the iniquity of my heart.” And “Declare thou at the first your sins, that you may be justified.” And, “The righteous man is an accuser of himself at the first speaking.”
Secondly, of great humbleness of mind: For it is like a golden chain; if one have hold of the beginning, all will follow. Because if you confess your sin as one ought to confess, the soul is humbled. For conscience turning it on itself causes it to be subdued.
Other things too must be added to humbleness of mind if it be such as the blessed David knew, when he said, “A broken and a contrite heart God will not despise.” For that which is broken does not rise up, does not strike, but is ready to be ill-treated and itself rises not up. Such is contrition of heart: though it be insulted, though it be evil entreated, it is quiet, and is not eager for vengeance.
And after humbleness of mind, there is need of intense prayers, of many tears, tears by day, and tears by night: for, he says, “every night, will I wash my bed, I will water my couch with my tears. I am weary with my groaning.” And again, “For I have eaten ashes as it were bread, and mingled my drink with weeping.”
Source: Homilies on the Epistle to the Hebrews (New Advent)