Now, if they say this because one may be more or less pleased, then the same thing may be said of justice and the other virtues; for it is plain that, with regard to them, we speak of people as being and showing themselves more or less virtuous: some men are more just and more brave than others, and it is possible to act more or less justly and temperately.
But if they mean that one pleasure may be more or less of a pleasure than another, I suspect that they miss the real reason when they say it is because some are pure and some are mixed. Why should it not be the same with pleasure as with health, which, though something determinate, yet allows of more and less? For the due proportion of elements [which constitutes health] is not the same for all, nor always the same for the same person, but may vary within certain limits without losing its character, being now more and now less truly health. And it may be the same with pleasure.
Again, assuming that the good is complete, while motion and coming into being are incomplete, they try to show that pleasure is a motion and a coming into being.