The sole use and sole object of existence is enjoyment or pleasure, which two words will here be treated as synonymous; happiness, also, though not quite identical in meaning, being occasionally substituted for them. Enjoyment, it must be observed, is of very various kinds, measures, and degrees. It may be sensual, or emotional, or imaginative, or intellectual, or moral. It may be momentary or eternal; intoxicating delight or sober satisfaction. It may be unmixed and undisturbed, in which case, however short of duration or coarse in quality, it may in strictness be called happiness; or it may be troubled and alloyed, although of a flavour which would be exquisite if pure, and if there were nothing to interfere with the perception of it. Understood, however, in a sufficiently comprehensive sense, enjoyment or pleasure may be clearly perceived to be the sole object of existence. The whole value of life plainly consists of the enjoyment, present or future, which life affords, or is capable of affording or securing. Now, the excellence of all rules depends on their conduciveness to the object they have in view. The excellence of all rules of life must, therefore, depend on their conduciveness to the sole object which life has in view, viz., enjoyment. But the excellence of rules of life, or of conduct or modes of acting, would seem to be but another name for their morality, and the morality of actions obviously depends on their conformity to moral rules. Whence, if so much be admitted, it necessarily follows that the test of the morality of actions is their conduciveness to enjoyment.