The equivalent phrase for Pleasure, according to Mr. Spencer,[102] is “a feeling which we seek to bring into consciousness and retain there”; and similarly, Mr. Bain says that “pleasure and pain, in the actual or real experience, are to be held as identical with motive power.” But--granting that pleasures normally excite desire--it still does not seem to me that I judge pleasures to be greater and less exactly in proportion as they stimulate the will to actions tending to sustain them. Of course neither Mr. Bain nor Mr. Spencer must be understood to lay down that all pleasures when actually felt actually stimulate to exertion of some kind; since this is obviously not true of the pleasures of repose, a warm bath, etc. The stimulus must in such cases be understood to be latent and potential; only becoming actual when action is required to prevent the cessation or diminution of the pleasure. Thus a man enjoying rest after fatigue is vaguely conscious of a strong clinging to his actual condition, and of a latent readiness to resist any impulse to change it. Further, the stimulus of moderate pleasures and pains may become unfelt through habitual repression. For instance, in a habitually temperate man the stimulus to prolong the pleasure of eating or drinking usually ceases before the pleasure ceases: it is only occasionally that he feels the need of controlling an impulse to eat or drink up to the point of satiety. So again, a protracted pain of moderate intensity and free from alarm--such as a dull prolonged toothache--seems sometimes to lose its felt stimulus to action without losing its character as pain. Here again the stimulus may be properly conceived as latent: since if asked whether we should like to get rid of even a mild toothache, we should certainly answer yes.