At the outset we take a long scope in our survey and present to ourselves the epoch when philosophy was still consciously, and not simply by implication, human, when reflective thought had not developed its own technique of method, and was in no danger of being caught in its own machinery--the time of Socrates. What does the assertion of Socrates that an unexamined life is not one fit to be led by man; what does his injunction “Know thyself” mean? It means that the corporate motives and guarantees of conduct are breaking down. We have got away from the time when the individual could both regulate and justify his course of life by reference to the ideals incarnate in the habits of the community of which he is a member. The time of direct and therefore unconscious union with corporate life, finding therein stimuli, codes, and values, has departed. The development of industry and commerce, of war and politics, has brought face to face communities with different aims and diverse habits; the development of myth and animism into crude but genuine scientific observation and imagination has transformed the physical widening of the horizon, brought about by commerce and intercourse, into an intellectual and moral expansion. The old supports fail precisely at the time when they are most needed--before a widening and more complex scene of action. Where, then, shall the agent of action turn? The “Know thyself” of Socrates is the reply to the practical problem which confronted Athens in his day. Investigation into the true ends and worths of human life, sifting and testing of all competing ends, the discovery of a method which should validate the genuine and dismiss the spurious, had henceforth to do for man what consolidated and incorporate custom had hitherto presented as a free and precious gift. With Socrates the question is as direct and practical as the question of making one’s living or of governing the state; it is indeed the same question put in its general form. It is a question that the flute player, the cobbler, and the politician must face no more and no less than the reflective philosopher. The question is addressed by Socrates to every individual and to every group with which he comes in contact. Because the question is practical it is individual and direct. It is a question which every one must face and answer for himself, just as in the Protestant scheme every individual must face and solve for himself the question of his final destiny.