Recall that when Augustine talked with the Manichean Faustus, he found the bishop unable to resolve his doubts about the religion. Ambrose, however, quickly defuses some of the Manichean critiques of Christianity through his public preaching, even before Augustine approaches him personally. It’s worth noting that Ambrose’s interpretation, while applying spiritual meanings to the Old Testament stories, would still have upheld a basically literal interpretation as well. In other words, Christians in antiquity took the basic historicity of the biblical stories for granted in a way that many modern critical scholars don’t; it’s just that they allowed room for additional layers of meaning in a way that the Manicheans woodenly denied. Augustine himself will give an example of such interpretation in the final book of
Confessions. Recall also that Augustine had technically been a catechumen, or baptismal candidate, since childhood; he just never chose to pursue baptism. Now, however, he is ready to seek a guiding “light”—that of God, rather than the inner spark the Manichees had encouraged him to nurture.