Augustine, in speaking of the word faith, admonishes the reader that in Scripture this word does not signify mere knowledge, such as wicked men possess, but that confidence or trust, by which alarmed sinners are comforted and lifted up.

We, moreover, teach, that the performance of works is necessary, because it is commanded of God, and not because we expect to merit grace by them.

Pardon of sins and grace are obtained only by faith.

And because the Holy Spirit is received by faith the heart of man is renovated, and new affections produced, that he may be able to perform good works.

Accordingly, Ambrosius states, faith is the source of holy volitions and an upright life.