men come to be utterly destitute of Self-Mastery, i.e. low and bad.
But those Pleasures which are unconnected with Pains do not admit of excess: i.e. such as belong to objects which are naturally pleasant and not merely as a matter of result: by the latter class I mean such as are remedial, and the reason why these are thought to be pleasant is that the cure results from the action in some way of that part of the constitution which remains sound. By “pleasant naturally” I mean such as put into action a nature which is pleasant.
The reason why no one and the same thing is invariably pleasant is that our nature is, not simple, but complex, involving something different from itself (so far as we are corruptible beings). Suppose then that one part of this nature be doing something, this something is, to the other part, unnatural: but, if there be an equilibrium of the two natures, then whatever is being done is indifferent. It is obvious that if there be any whose nature is simple and not complex, to such a being the same course of acting will always be the most pleasurable.