What we are pleased to call our Mind is made up of two parts--our Consciousness and--what I shall call loosely yet sufficingly and without prejudice to Metaphysics--our Sub-Consciousness. The latter is immeasurably the vaster portion. It is a tossing ocean of thoughts which feeds the narrow little fountain of Consciousness. It holds all our memories. We cannot be conscious of all ourselves and all our past at once--that way madness lies, or divinity. We may know ten languages, but we can only think in the mould of one at a time. Our thoughts and memories can only come up into clear Consciousness by ones or twos--to be dealt with and then dismissed. They spirit from the great deep of Sub-Consciousness into the thin fountain-stream of Consciousness, and fall back again into the great deep. And this great deep is never still, though we know nothing of its churning save by its tossing up through the fountain some new mental combination of which it had received only the elements--as when the mathematician has the solution of a problem flashed upon him at the moment of waking, or as the author has the development of his plot thrust upon him when he is playing billiards, or as the wit finds repartees invented for him by his brilliant but unknown collaborator. This is what the crowd calls "inspiration," the late Mr. Stevenson "Brownies," and the scientist "unconscious cerebration." A man of talent has a good Working Consciousness, a man of genius a good Working Sub-Consciousness. Hence the frequent mental instability of genius. The Infant Prodigy's feats are done by his Sub-Consciousness. Instinct is Racial Genius, Genius is Individual Instinct. The highest Genius is sane. A Shakespeare or a Goethe has both a good Working Consciousness and a good Working Sub-Consciousness, with the former so self-balanced that it regulates the products of the latter. The cultivation of the Working Consciousness may either improve or impair the products of its bigger brother. Education, the cultivation of the critical faculty, would be fatal to some writers, actors, painters, and musicians; it would but spoil the Working Sub-Consciousness. Others--more sanely balanced--would gain in art more than they lost in nature.