Anti-pelagian Writings by St. Augustine
Chapter 39 [XVI]--Prayer and Exhortation.
There are some, moreover, who either do not pray at all, or pray coldly, because, from the Lord's words, they have learnt that God knows what is necessary for us before we ask it of Him. Must the truth of this declaration be given up, or shall we think that it should be erased from the gospel because of such people? Nay, since it is manifest that God has prepared some things to be given even to those who do not pray for them, such as the beginning of faith, and other things not to be given except to those who pray for them, such as perseverance even unto the end, certainly he who thinks that he has this latter from himself does not pray to have it. Therefore we must take care lest, while we are afraid of exhortation growing lukewarm, prayer should be stifled and arrogance stimulated.