III. Our waking will can only realize or act on such images as it

has kept familiarly before it, or such as have been so often recalled that they recur spontaneously. But all the treasures of memory seem to be available to the dream ruler, and with them a loose facile power of grouping them into kaleidoscopic combinations. Thus, if one could imagine a kaleidoscope which at every turn made varied groups of human or other figures in different attitudes, with changing scenery; and then suppose this to be turned round by some simple vital or mechanical action, he would have an idea of the action of dreams. It is probable that the radical function of the dream-power is to prevent images from becoming utterly forgotten or rusty; and by exercising the faculty of facile or chance combination to keep awake in man originality and creativeness. For it is almost certain that, but for the intrusion of this faculty into our waking thoughts, man would become a mere animal, without an idea beyond the joint common appetites, instincts, and emotions of the lowest of his kind.