[100] For the eyes of our body look upon the appearance of the sun by day and of the moon by night as standing still, and yet who is there who does not know that the rapidity of movements of these two bodies is incomparable, since they go round the whole heaven in one day? Thus, indeed, the universal heaven itself also, while appearing to stand still, revolves in a circle; its movement being detected and comprehended by the invisible and more divine eye which is placed in our mind.