delightful things, then they are poured out in vain and fond motions towards things which have no existence. Now this happens from a certain disease of mind, by reason of which they see not the things which are, but long to bring to their sight those which are not. But thus it happens also to those who are suffering phrenzy, and seem to themselves to see many images, because their soul, being torn and withdrawn from its place by excess of cold or of heat, suffers a failure of its natural service. But those also who are in distress through thirst, when they fall asleep, seem to themselves to see rivers and fountains, and to drink; but this befalls them through being distressed by the dryness of the unmoistened body. Wherefore it is certain that this occurs through some ailment either of the soul or body.'
Chap. lxv.—Fallacy of imagination.
"In short, that you may receive the faith of the matter; concerning Jerusalem, which I had often seen, I told my brother what places and what gatherings of people I had seemed to myself to see. But also concerning Cæsarea, which I had never seen, I nevertheless contended that it was such as I had conceived it in my mind and thought. But when I came hither, and saw nothing at all like to those things which I had seen in phantasy, I blamed myself, and observed distinctly, that I had assigned to it gates, and walls, and buildings from others which I had seen, taking the likeness in reality from others. Nor indeed can any one imagine anything new, and of which no form has ever existed. For even if any one should fashion from his imagination bulls with five heads, he only forms them with five heads out of those which he has seen with one head. And you therefore, now, if truly you seem to yourself to perceive anything with your thought, and to look above the heavens, there is no doubt but that you imagine them from those things which you see, placed as you are upon the earth. But if you think that there is easy access for your mind above the heavens, and that you are able to conceive the things that are there, and to apprehend knowledge of that immense light, I think
