4 It’s impossible for those who once understood and experienced God’s heavenly gift—who shared in receiving the Holy Spirit, 5 who had known God’s good word and the power of the coming age— 6 and then completely abandon6:6. "Completely abandon." The word in the Greek text is only used once in the New Testament and means to totally renounce and repudiate a belief. It is not the usual word for apostasy. God, for them to be brought back to repentance once more. They themselves have crucified the Son of God all over again and publicly humiliated him.