What shall we say about Abraham, the ancestor from whom we are all descended? If Abraham was justified as a reward for doing something, he would really have had something to boast about, though not in God’s sight because scripture says: Abraham put his faith in God, and this faith was considered as justifying him. If a man has work to show, his wages are not considered as a favour but as his due; but when a man has nothing to show except faith in the one who justifies sinners, then his faith is considered as justifying him. And David says the same: a man is happy if God considers him righteous, irrespective of good deeds:

Happy those whose crimes are forgiven,

whose sins are blotted out;

happy the man whom the Lord considers sinless.