Hebrews 6:4-6

Twentieth_Century(i) 4 For if those who were once for all brought into the Light, and learned to appreciate the gift from Heaven, and came to share in the Holy Spirit, 5 and learned to appreciate the beauty of the Divine Message, and the new powers of the Coming Age-- 6 if those, I say, fell away, it would be impossible to bring them again to repentance; they would be crucifying the Son of God over again for themselves, and exposing him to open contempt.