It may be said that all this only proves Socrates to have been, in his own estimation, a good and happy, but not necessarily a wise man. With him, however, the last of these conditions was inseparable from the other two. He was prepared to demonstrate, step by step, that his conduct was regulated by fixed and ascertainable principles, and was of the kind best adapted to secure happiness both for himself and for others. That there were deficiencies in his ethical theory may readily be admitted. The idea of universal beneficence seems never to have dawned on his horizon; and chastity was to him what sobriety is to us, mainly a self-regarding virtue. We do not find that he ever recommended conjugal fidelity to husbands; he regarded prostitution very much as it is still, unhappily, regarded by men of the world among ourselves; and in opposing the darker vices of his countrymen, it was the excess rather than the perversion of appetite which he condemned. These, however, are points which do not interfere with our general contention that Socrates adopted the ethical standard of his time, that he adopted it on rational grounds, that having adopted he acted up to it, and that in so reasoning and acting he satisfied his own ideal of absolute wisdom. Even as regards physical phenomena, Socrates, so far from professing complete ignorance, held a very positive theory which he was quite ready to share with his friends. He taught what is called the doctrine of final causes; and, so far as our knowledge goes, he was either the first to teach it, or, at any rate, the first to prove the existence of divine agencies by its means. The old poets had occasionally attributed the origin of man and other animals to supernatural intelligence, but, apparently, without being led to their conviction by any evidence of design displayed in the structure of organised creatures. Socrates, on the other hand, went through the various external organs of the human body with great minuteness, and showed, to his own satisfaction, that they evinced the workings of a wise and beneficent Artist. We shall have more to say further on about this whole argument; here we only wish to observe that, intrinsically, it does not differ very much from the speculations which its author derided as the fruit of an impertinent curiosity; and that no one who now employed it would, for a single moment, be called an agnostic or a sceptic.