On Two Souls, Against the Manichaeans

Through the assisting mercy of God, the snares of the Manichæans having been broken to pieces and left behind, having been restored at length to the bosom of the Catholic Church, I am disposed now at least to consider and to deplore my recent wretchedness. For there were many things that I ought to have done to prevent the seeds of the most true religion wholesomely implanted in me from boyhood, from being banished from my mind, having been uprooted by the error and fraud of false and deceitful men. For, in the first place, if I had soberly and diligently considered, with prayerful and pious mind, those two kinds of souls to which they attributed natures and properties so distinct that they wished one to be regarded as of the very substance of God, but were not even willing that God should be accepted as the author of the other; perhaps it would have appeared to me, intent on learning, that there is no life whatsoever, which, by the very fact of its being life and in so far as it is life at all, does not pertain to the supreme source and beginning of life, which we must acknowledge to be nothing else than the supreme and only and true God.