(But some Pleasures result when natural states are being perfected: these therefore are good as a matter of result.)
Again, the very fact of their being violent causes them to be pursued by such as can relish no others: such men in fact create violent thirsts for themselves (if harmless ones then we find no fault, if harmful then it is bad and low) because they have no other things to take pleasure in, and the neutral state is distasteful to some people constitutionally; for toil of some kind is inseparable from life, as physiologists testify, telling us that the acts of seeing or hearing are painful, only that we are used to the pain and do not find it out.
Similarly in youth the constant growth produces a state much like that of vinous intoxication, and youth is pleasant. Again, men of the melancholic temperament constantly need some remedial process (because the body, from its temperament, is constantly being worried), and they are in a chronic state of violent desire. But Pleasure drives out Pain; not only such Pleasure as is directly contrary to Pain but even any Pleasure provided it be strong: and this is how 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.
For this reason it is that the Divinity feels Pleasure which is always one, i.e. simple: not motion merely but also motionlessness acts, and Pleasure resides rather in the absence than in the presence of motion.
The reason why the Poet’s dictum “change is of all things most pleasant” is true, is “a baseness in our blood;” for as the bad man is easily changeable, bad must be also the nature that craves change, i.e. it is neither simple nor good.
We have now said our say about Self-Control and its opposite; and about Pleasure and Pain. What each is, and how the one set is good the other bad. We have yet to speak of Friendship.