Hebrews 6 Distinction between falling or falling away

4It is impossible for those who have once been enlightened, who have tasted the heavenly gift, who have shared in the Holy Spirit, 5who have tasted the goodness of the word of God and the powers of the coming age— 6and then have fallen away—to be restored again to repentance, because they themselves are crucifying the Son of God all over again and subjecting Him to open shame.

There are two camps concerning these verses, two different commentaries. Some say that these were never really saved, like the Pharisees that did religious things, lofty prayers, religious acts, they were never really saved. Others say they were once Christians that fell from faith that grieved the Holy Spirt.

David Guzik writes;
 iv. This difficult passage is best understood in the context of Hebrews 6:1-2. The writer to the Hebrews means that if they retreat back to Judaism, all the religious “repentance” in the world will do them no good. Retreating from distinctive Christianity into the “safe” ideas and customs of their former religious experience is to forsake Jesus, and to essentially crucify Him again. This is especially true for these ancient Christians from a Jewish background, since the religious customs they took up again likely included animal sacrifice for atonement, denying the total work of Jesus for them on the cross.
e. If they fall away: There is a necessary distinction between falling and falling away. Falling away is more than falling into sin; it is actually departing from Jesus Himself. For a righteous man may fall seven times and rise again, but the wicked shall fall by calamity (Proverbs 24:16). The difference is between a Peter and a Judas. If you depart from Jesus (fall away) there is no hope.

Judas fell away, Peter fell. Peter grieved over his sin and was restored. Judas betrayed Jesus and Jesus said it would have been better for Judas to have never been born.
Matthew 26:24 The Son of Man will go just as it is written about him. But woe to that man who betrays the Son of Man! It would be better for him if he had not been born."

If you have fallen into sin, repent and be restored.
If you have fallen away, woe to you.

Blessings, David