The process by which the moral law (or rather, the law of conduct which includes, but is not coincident with the moral law) is developed, is a process of generalization. It corresponds to a vast induction carried on by the race as organized in society. Beginning with modes of conduct which are seen to be bad, society gradually perceives that the ultimate principle of classification must be by the primary feelings, that rules of conduct must be expressed in terms of character, and other rules which concern the application of these to more special cases must take a subordinate position and be regarded as only of conditional value. All these rules must necessarily correspond, within very narrow limits, to a statement of the conditions of vitality of the tissue which they characterize. In an ideal state of society, every general principle would also be recognized in every particular rule. This is a result a gradual approximation to which, rather than its actual attainment, must be anticipated. Morality implies action for the good of others in some sense. Society may be regarded both as an aggregate and as an organism. There are certain qualities which we may suppose to vary in the individual without necessarily involving a change in the social structure. How is the general rule, as distinguished from other rules, deduced from the general principle of social vitality? The law of nature has but one precept, "Be strong." But when we regard the individual in his relations to society, the law takes on different forms. This may be expressed by saying that the law "Be strong," has two main branches, "Be prudent" and "Be virtuous," the first applying to cases in which the individual is primarily affected, the other to those in which the units are affected through society and the social factor must be taken into account. To find a classification of the virtues that will not run into infinite detail or be a simple affirmation of the general principle, the internal development of moral character under its emotional and intellectual aspects may furnish a sufficient method. The general formula of primary individual virtues is: "Be strong." The condition of vitality of the individual as a complex of instincts, is expressed by the formula: "Be temperate." And the class of virtues referring to the conditions of intellectual efficiency, has the general rule: "Be truthful."