From St. Athanasius the Great, written 333 AD
3. Wherefore then, my beloved, do we not acknowledge the grace as becomes the feast? Wherefore do we not make a return to our Benefactor? It is indeed impossible to make an adequate return to God; still, it is a wicked thing for us who receive the gracious gift, not to acknowledge it. Nature itself manifests our inability; but our own will reproves our unthankfulness. Therefore the blessed Paul, when admiring the greatness of the gift of God, said, 'And who is sufficient for these things 2 Corinthians 2:17?' For He made the world free by the blood of the Saviour; then, again, He has caused the grave to be trodden down by the Saviour's death, and furnished a way to the heavenly gates free from obstacles to those who are going up. Wherefore, one of the saints, while he acknowledged the grace, but was insufficient to repay it, said, 'What shall I render unto the Lord for all He has done unto me ?' For instead of death he had received life, instead of bondage , freedom, and instead of the grave, the kingdom of heaven. For of old time, 'death reigned from Adam to Moses;' but now the divine voice has said, 'Today shall you be with Me in Paradise.' And the saints, being sensible of this, said, 'Except the Lord had helped me, my soul had almost dwelt in hell.. ' Besides all this, being powerless to make a return, he yet acknowledged the gift, and wrote finally, saying, 'I will take the cup of salvation, and call on the name of the Lord; precious in His sight is the death of His saints. '