BOOK I. VI. 10-17
whereby, when we meet with sensible objects, we do not merely have their forms impressed upon us, but also make a selection from among them, and subtract and add, and make these various combinations by using them, yes, and, by Zeus, pass from some things to certain others which are in a manner related to them—is not even all this sufficient to stir our friends and induce them not to leave the artificer out of account? Else let them explain to us what it is that produces each of these results, or how it is possible that objects so wonderful and so workmanlike should come into being at random and spontaneously.
What then? Is it in the case of man alone that these things occur? You will, indeed, find many things in man only, things of which the rational animal had a peculiar need, but you will also find many possessed by us in common with the irrational animals. Do they also, then, understand what happens? No! for use is one thing, and understanding another. God had need of the animals in that they make use of external impressions, and of us in that we understand the use of external impressions. And so for them it is sufficient to eat and drink and rest and procreate, and whatever else of the things within their own province the animals severally do; while for us, to whom He has made the additional gift of the faculty of understanding, 15these things are no longer sufficient, but unless we act appropriately, and methodically, and in conformity each with his own nature and constitution, we shall no longer achieve our own ends. For of beings whose constitutions are different, the works and the ends are likewise different. So for the being whose constitution is adapted to use
