the square on the hypotenuse. The one man meditated on metaphysics as the other man did on mathematics; for the love of truth or for curiosity or for the fun of the thing. But that sort of fun never seems to have interfered very much with the other sort of fun; the fun of dancing or singing to celebrate some rascally romance about Zeus becoming a bull or a swan. It is perhaps the proof of a certain superficiality and even insincerity about the popular polytheism, that men could be philosophers and even sceptics without disturbing it. These thinkers could move the foundations of the world without altering even the outline of that coloured cloud that hung above it in the air.
For the thinkers did move the foundations of the world; even when a curious compromise seemed to prevent them from moving the foundations of the city. The two great philosophers of antiquity do indeed appear to us as defenders of sane and even of sacred ideas; their maxims often read like the answers to sceptical questions too completely answered to be always recorded. Aristotle annihilated a hundred anarchists and nature-worshipping cranks by the fundamental statement that man is a political animal. Plato in some sense anticipated the Catholic realism, as attacked by the heretical nominalism, by insisting on the equally fundamental fact that ideas are realities; that ideas exist just as men exist. Plato however seemed sometimes almost to fancy that ideas exist as men do not exist; or that the men need hardly be considered where they conflict with the ideas. He had something of the social sentiment that we call Fabian in his ideal of fitting the citizen to the city, like an imaginary head to an ideal hat; and great and glorious as he remains, he has been the father of all faddists. Aristotle anticipated more fully the sacramental sanity that was to combine the body and the soul of things; for he considered the nature of men as well as the nature of morals, and looked to the eyes as well as to the light. But though these great men were in that sense constructive and conservative, they belonged to a world where thought was free to the point of being