24. For, although I took no trouble to learn what he said, but only to hear how he said it–for this empty concern remained foremost with me as long as I despaired of finding a clear path from man to thee–yet, along with the eloquence I prized, there also came into my mind the ideas which I ignored; for I could not separate them. And, while I opened my heart to acknowledge how skillfully he spoke, there also came an awareness of how truly he spoke–but only gradually. First of all, his ideas had already begun to appear to me defensible; and the Catholic faith, for which I supposed that nothing could be said against the onslaught of the Manicheans, I now realized could be maintained without presumption. This was especially clear after I had heard one or two parts of the Old Testament explained allegorically–whereas before this, when I had interpreted them literally, they had “killed” me spiritually. However, when many of these passages in those books were expounded to me thus, I came to blame my own despair for having believed that no reply could be given to those who hated and scoffed at the Law and the Prophets. Yet I did not see that this was reason enough to follow the Catholic way, just because it had learned advocates who could answer objections adequately and without absurdity. Nor could I see that what I had held to heretofore should now be condemned, because both sides were equally defensible. For that way did not appear to me yet vanquished; but neither did it seem yet victorious.
25. But now I earnestly bent my mind to require if there was possible any way to prove the Manicheans guilty of falsehood. If I could have conceived of a spiritual substance, all their strongholds would have collapsed and been cast out of my mind. But I could not. Still, concerning the body of this world, nature as a whole–now that I was able to consider and compare such things more and more–I now decided that the majority of the philosophers held the more probable views. So, in what I thought was the method of the Academics–doubting everything and fluctuating between all the options–I came to the conclusion that the Manicheans were to be abandoned. For I judged, even in that period of doubt, that I could not remain in a sect to which I preferred some of the philosophers. But I refused to commit the cure of my fainting soul to the philosophers, because they were without the saving name of Christ. I resolved, therefore, to become a catechumen in the Catholic Church–which my parents had so much urged upon me–until something certain shone forth by which I might guide my course.