Abstract
Secondly, there is the approach of Augustine. Augustine focusses his original attention on the fact of understanding of immaterial substances, and thus can be said to begin his investigation of the soul with a conception of the soul as a substance separate in itself, apprehending universals in an immediate and direct act. Augustine, and the philosophers in this tradition, face the reverse of Aristotle's problem, for they must try to account for the fact of sensation with which he began, and they must explain why the soul troubles to animate the body at all, why it operates at all through the medium of the body.