Hebrews 6:6

If they shall fall away. Apostasize from the faith.

To renew them unto repentance. He is so far fallen that he has no capacity left for repentance. Judas the Apostate sorrowed, but his sorrows became despair. There was remorse but not repentance.

Seeing they crucify to themselves the Son of God afresh. By rejecting Christ they place themselves with those who rejected him and crucified him because he affirmed that he was the Son of God. Those meant are not those "overtaken in a fault" (Ga 6:1), or backsliders only, but men once Christian professors who not only turn away from but oppose Christ.
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