 Averroes finally reflects on absolutely necessary, which seemed to be excluded by Aristotle in the passage. Whenever we ask for the reason of products of Nature or of the arts, the answer we get is their final cause, for instance, why does a saw have sharp teeth? To cut wood. The answer however is completely different in the case of the eternal beings. An eternal being acts because of its essence, its activity is because of itself, propter ipsum, and necessity is unconditional (LC 83F TC88).