The psyche consists essentially of images. It is a series of images in the truest sense, not an accidental juxtaposition or sequence, but a structure that is throughout full of meaning and purpose; it is a "picturing" of vital activities. And just as the material of the body that is ready for life has need of the psyche in order to be capable of life, so the psyche presupposes the living body in order that its images may live.