Jerome:
[The Greeks] speak of trespass as the first step toward sin. It is when a secret thought steals in, and, though we offer a measure of collusion, it does not yet drive us on to ruin.… But sin is something else. It is when the collusion is actually completed and reaches its goal.
Chrysostom:
Paul encourages them by including himself with them. “Among these,” he says, “we all once lived.” All are included. It is not possible to say that anyone is exempted.
Ambrosiaster:
These are the true riches of God’s mercy, that even when we did not seek it mercy was made known through his own initiative.… This is God’s love to us, that having made us he did not want us to perish. His reason for making us was that he might love what he had made, seeing that no one hates his own workmanship.