We observe this at the outset in the more-mystified-than mystifying theory of ideas. Obviously, the theory of ideas belongs to Socrates; the Platonic element is a theory not of ideas so much as of ideals. Socrates wants truth, but Plato wants beauty, harmony. Socrates is bent on argument, and points you to a concept; Plato is a poet with a vision, and points you to the picture that he sees. Understanding, says Plato, is of the earth earthly; but poetic vision is divine.[22] Hence the maze of quibbling in the dialogues; it is Plato and not Socrates who is culprit here. Reasoning was an alien art to Plato; try as he might to become a mathematician he remained always a poet,--and perhaps most so when he dealt with numbers. Dialectic was in Plato’s day a recent invention; he plays with it like a youth in the breakers, letting it now raise him to heights of ecstatic vision and now bury him in the deadliest logic-chopping. But--let us not doubt it--he knows when he is logic-chopping; he goes on, partly that he may paint his picture, partly for the mere joy of parrying pros and cons; this new game, he feels, is a sport for the gods. Let us smile at the heavy seriousness of those who suppose that this man meant everything he said. No one does, but least of all men Plato, who hardly taught except in parables. What is the “heaven” of the ideas but a poet’s way of saying that the constancies observable in the relations among things are not identical with the things themselves, but have a reality and permanence of their own? So we phrase it in our own distinguished verbiage; but Plato prefers, as ever, to draw a picture. And notice, in this picture, the ever present reference to social needs. What is a concept, after all, but a scheme for the conservation of mental resources, an instrument of prediction, a method of control? Without the power to form concepts we could never turn experience to use, it would slip between our fingers; we should be like the maidens condemned to carry water in a sieve. The _idea_ of anything is the sum of its observed constancies of behavior; hence the medium of our adaptation and control. To have _ideas_ of things is to know the map or plan of things; it is to see tendencies, directions, and results; it is to know how to _use_ things. That is why knowledge is power; every idea is a tool with which to bend the world to serve our will. And that too is why the Ideas are real: they have power, and “anything which possesses any sort of power is real.”[23]