For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Spirit,
All Commentaries on Hebrews 6:4 Go To Hebrews 6
John Chrysostom
AD 407
And see how putting them to shame, and forbiddingly he begins. Impossible. No longer (he says) expect that which is not possible; (For he said not, It is not seemly, or, It is not expedient, or, It is not lawful, but impossible, so as to cast [them] into despair), if you have once been altogether enlightened.