Chapter 33 — Part IV: Prayer — On Prayer in General
Section 77. Faith And Confidence — Faith is another necessary quality for this preparation of soul. Without faith, we can have no knowledge of the omnipotence or mercy of the supreme Father, which are the sources of our confidence in prayer, as Christ the Lord Himself has taught: All things whatsoever you shall ask in prayer, believing, you shall receive. St. Augustine, speaking of this faith, thus comments on the Lord's words: Without faith prayer is useless.