7. SOCRATES AND THE SOCRATIC SCHOOLS.--Although Socrates (468-399 B.C.) left no writings behind him, yet the intellect of Greece was powerfully affected by the principles of his philosophy, and the greatest literary genius that ever appeared in Hellas owed most of his mental training to his early intercourse with him. It was by means of conversation, by a searching process of question and answer, that Socrates endeavored to lead his pupils to a consciousness of their own ignorance, and thus to awaken in their minds an anxiety to obtain more exact views. This method of questioning he reduced to a scientific process, and "dialectics" became a name for the art of reasoning and the science of logic. The subject-matter of this method was moral science considered with special reference to politics. To him may be justly attributed induction and general definitions, and he applied this practical logic to a common-sense estimate of the duties of man both as a moral being and as a member of a community, and thus he first treated moral philosophy according to scientific principles. No less than ten schools of philosophers claimed him as their head, though the majority of them imperfectly represented his doctrines. By his influence on Plato, and through him on Aristotle, he constituted himself the founder of the philosophy which is still recognized in the civilized world. From the doctrine held by Socrates, that virtue was dependent on knowledge, Eucleides of Megara (fl. 398 B.C.), the founder of the Megaric school, submitted moral philosophy to dialectical reasoning and logical refinements; and from the Socratic principle of the union between virtue and happiness, Aristippus of Cyrene (fl. 396 B.C.) deduced the doctrine which became the characteristic of the Cyrenian school, affirming that pleasure was the ultimate end of life and the higher good; while Antisthenes (fl. 396 B.C.) constructed the Cynic philosophy, which placed the ideal of virtue in the absence of every need, and hence in the disregarding of every interest, wealth, honor, and enjoyment, and in the independence of any restraints of life and society. Diogenes of Sinope (fl. 300 B.C.) was one of the most prominent followers of this school. He, like his master, Antisthenes, always appeared in the most beggarly clothing, with the staff and wallet of mendicancy; and this ostentation of self-denial drew from Socrates the exclamation, that he saw the vanity of Antisthenes through the holes in his garments.