How is it then that no one feels Pleasure continuously? is it not that he wearies, because all human faculties are incapable of unintermitting exertion; and so, of course, Pleasure does not arise either, because that follows upon the act of Working. But there are some things which please when new, but afterwards not in the like way, for exactly the same reason: that at first the mind is roused and works on these Objects with its powers at full tension; just as they who are gazing stedfastly at anything; but afterwards the act of Working is not of the kind it was at first, but careless, and so the Pleasure too is dulled.
Again, a person may conclude that all men grasp at Pleasure, because all aim likewise at Life and Life is an act of Working, and every man works at and with those things which also he best likes; the musical man, for instance, works with his hearing at music; the studious man with his intellect at speculative questions, and so forth. And Pleasure perfects the acts of Working, and so Life after which men grasp. No wonder then that they aim also at Pleasure, because to each it perfects Life, which is itself choice-worthy. (We will take leave to omit the question whether we choose Life for Pleasure’s sake of Pleasure for Life’s sake; because these two plainly are closely connected and admit not of separation; since Pleasure comes not into being without Working, and again, every Working Pleasure perfects.)
And this is one reason why Pleasures are thought to differ in kind, because we suppose that things which differ in kind must be perfected by things so differing: it plainly being the case with the productions of Nature and Art; as animals, and trees, and pictures, and statues, and houses, and furniture; and so we suppose that in like manner acts of Working which are different in kind are perfected by things differing in kind. Now Intellectual Workings differ specifically from those of the Senses, and these last from one another; therefore so do the Pleasures which perfect them.
This may be shown also from the intimate connection subsisting between each Pleasure and the Working which it perfects: I mean, that the Pleasure proper to any Working increases that Working; for they who work with Pleasure sift all things more closely and carry them out to a greater degree of nicety; for instance, those men become geometricians who take Pleasure in geometry, and they apprehend particular points more completely: in like manner men who are fond of music, or architecture, or anything else, improve each on his own pursuit, because they feel Pleasure in them. Thus the Pleasures aid in increasing the Workings, and things which do so aid are proper and peculiar: but the things which are proper and peculiar to others specifically different are themselves also specifically different.
Yet even more clearly may this be shown from the fact that the Pleasures arising from one kind of Workings hinder other Workings; for instance, people who are fond of flute-music cannot keep their attention to conversation or discourse when they catch the sound of a flute; because they take more Pleasure in flute-playing than in the Working they are at the time engaged on; in other words, the Pleasure attendant on flute-playing destroys the Working of conversation or discourse.
Much the same kind of thing takes place in other cases, when a person is engaged in two different Workings at the same time: that is, the pleasanter of the two keeps pushing out the other, and, if the disparity in pleasantness be great, then more and more till a man even ceases altogether to work at the other.
This is the reason why, when we are very much pleased with anything whatever, we do nothing else, and it is only when we are but moderately pleased with one occupation that we vary it with another: people, for instance, who eat sweetmeats in the theatre do so most when the performance is indifferent.
Since then the proper and peculiar Pleasure gives accuracy to the Workings and makes them more enduring and better of their kind, while those Pleasures which are foreign to them mar them, it is plain there is a wide difference between them: in fact, Pleasures foreign to any Working have pretty much the same effect as the Pains proper to it,[[12]] which, in fact, destroy the Workings; I mean, if one man dislikes writing, or another calculation, the one does not write, the other does not calculate; because, in each case, the Working is attended with some Pain: so then contrary effects are produced upon the Workings by the Pleasures and Pains proper to them, by which I mean those which arise upon the Working, in itself, independently of any other circumstances. As for the Pleasures foreign to a Working, we have said already that they produce a similar effect to the Pain proper to it; that is they destroy the Working, only not in like way.
Well then, as Workings differ from one another in goodness and badness, some being fit objects of choice, others of avoidance, and others in their nature indifferent, Pleasures are similarly related; since its own proper Pleasure attends or each Working: of course that proper to a good Working is good, that proper to a bad, bad: for even the desires for what is noble are praiseworthy, and for what is base blameworthy.
Furthermore, the Pleasures attendant on Workings are more closely connected with them even than the desires after them: for these last are separate both in time and nature, but the former are close to the Workings, and so indivisible from them as to raise a question whether the Working and the Pleasure are identical; but Pleasure does not seem to be an Intellectual Operation nor a Faculty of Perception, because that is absurd; but yet it gives some the impression of being the same from not being separated from these.