From the introduction to Sheed’s translation of Augustine’s Confessions:

We follow Augustine as he thought himself out of this dilemma, in Rome and Milan, like a man gasping for air. At last, in the summer of 386, he broke free. A few nameless books, written by nameless “Platonists translated from Greek into Latin,” were lent to him by a nameless intellectual—“a certain man—an incredibly conceited man” (VII.9.13). (Books that really changed Augustine’s mind, like the friends whose departures had really cut into his heart, remain nameless: a source of much fruitful frustration to the modern scholar, but characteristic of the whole tone of Augustine’s narrative of this crucial time.) Within a month or so, the system which we now know as the Catholic Platonism of Augustine slipped into place.