The actual evolution of the individual psyche is a result of the interaction between the individual and the outer universe. Which means that just as a child in the womb grows as a result of the parental blood-stream which nourishes the vital quick of the fœtus, so does every man and woman grow and develop as a result of the polarized flux between the spontaneous self and some other self or selves. It is the circuit of vital flux between itself and another being or beings which brings about the development and evolution of every individual psyche and physique. This is a law of life and creation, from which we cannot escape. Ascetics and voluptuaries both try to dodge this main condition, and both succeed perhaps for a generation. But after two generations all collapses. Man doth not live by bread alone. He lives even more essentially from the nourishing creative flow between himself and another or others. This is the reality of the extra-individual circuits of polarity, those established between two or more individuals. But a corresponding reality is that of the internal, purely individual polarity—the polarity within a man himself of his upper and lower consciousness, and his own voluntary and sympathetic modes. Here is a fourfold interaction within the self. And from this fourfold reaction within the self results that final manifestation which we know as _mind_, mental consciousness. The brain is, if we may use the word, the terminal instrument of the dynamic consciousness. It transmutes what is a creative flux into a certain fixed cypher. It prints off, like a telegraph instrument, the glyphs and grafic representations which we call percepts, concepts, ideas. It produces a new reality—the ideal. The idea is another static entity, another unit of the mechanical-active and materio-static universe. It is thrown off from life, as leaves are shed from a tree, or as feathers fall from a bird. Ideas are the dry, unliving, inscutient plumage which intervenes between us and the circumambient universe, forming at once an insulator and an instrument for the subduing of the universe. The mind is the instrument of instruments; it is not a creative reality.