We left St Augustine at the end of our last article and of book x of the De Trinitate with his image of the divine Trinity in the mind now completely delineated, and comprised in the mind's acts of remembering, understanding, and willing itself. A question, however, remained outstanding: whether there is any real distinction between the mind's memory and understanding of itself or only the verbal one. St Augustine is quite capable of showing the reality of the distinction by an effort of sheer mental introspection, and in fact he will do so in book XIV. But for the moment he is going to illustrate it by observing the lesser trinities the lower levels of human cognition, in sensation, imagination, and mental knowledge of the external, temporal world.