But they do not seem to be right even in saying that it is a motion: for every motion seems necessarily to be quick or slow, either absolutely, as the motion of the universe, or relatively; but pleasure is neither quick nor slow. It is, indeed, possible to be quickly pleased, as to be quickly angered; the feeling, however, cannot be quick, even relatively, as can walking and growing, etc. The passage to a state of pleasure, then, may be quick or slow, but the exercise of the power, i.e. the feeling of pleasure, cannot be quick.

Again, how can pleasure be a coming into being?

It seems that it is not possible for anything to come out of just anything, but what a thing comes out of, that it is resolved into. Pain, then, must be the dissolution of that whose coming into being is pleasure. Accordingly, they maintain that pain is falling short of the normal state, pleasure its replenishment.