So much of divine matters and the relation of man to God. But man is man, and dependent on pleasure and pain; and therefore to acquire a true taste respecting either is a great matter. And what is a true taste? This can only be explained by a comparison of one life with another. Pleasure is an object of desire, pain of avoidance; and the absence of pain is to be preferred to pain, but not to pleasure. There are infinite kinds and degrees of both of them, and we choose the life which has more pleasure and avoid that which has less; but we do not choose that life in which the elements of pleasure are either feeble or equally balanced with pain. All the lives which we desire are pleasant; the choice of any others is due to inexperience. Now there are four lives--the temperate, the rational, the courageous, the healthful; and to these let us oppose four others--the intemperate, the foolish, the cowardly, the diseased. The temperate life has gentle pains and pleasures and placid desires, the intemperate life has violent delights, and still more violent desires. And the pleasures of the temperate exceed the pains, while the pains of the intemperate exceed the pleasures. But if this is true, none are voluntarily intemperate, but all who lack temperance are either ignorant or wanting in self-control: for men always choose the life which (as they think) exceeds in pleasure. The wise, the healthful, the courageous life have a similar advantage--they also exceed their opposites in pleasure. And, generally speaking, the life of virtue is far more pleasurable and honourable, fairer and happier far, than the life of vice. Let this be the preamble of our laws; the strain will follow. As in a web the warp is stronger than the woof, so should the rulers be stronger than their half-educated subjects. Let us suppose, then, that in the constitution of a state there are two parts, the appointment of the rulers, and the laws which they have to administer. But, before going further, there are some preliminary matters which have to be considered. As of animals, so also of men, a selection must be made; the bad breed must be got rid of, and the good retained. The legislator must purify them, and if he be not a despot he will find this task to be a difficult one. The severer kinds of purification are practised when great offenders are punished by death or exile, but there is a milder process which is necessary when the poor show a disposition to attack the property of the rich, for then the legislator will send them off to another land, under the name of a colony. In our case, however, we shall only need to purify the streams before they meet. This is often a troublesome business, but in theory we may suppose the operation performed, and the desired purity attained. Evil men we will hinder from coming, and receive the good as friends.