And the scripture was fulfilled which says, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God.
All Commentaries on James 2:23 Go To James 2
Augustine of Hippo
AD 430
That Abraham believed God deep in his heart is a matter of faith alone, but that he took his son to sacrifice him . . . is not just a great act of faith but a great work as well. (Sermons 2.9)