"In man, personality is usually defined with reference to self-consciousness rather than to individuality; but the power of reflection and self-knowledge is linked up, in our type of personality at least, with the new flight of individuality — conscious memory seems necessarily to imply a vast increase of independence, so that it is all one whether we define the possessor of personality as a self-conscious individual, or as an individual whose individuality is more extensive both in space and time than the material substance of his body. Personality, as we know it, is free compared with the individuality of the lower animals; but it is still weighted down with the body. There may be personalities which have not merely transcended substance, but are rid of it altogether: in all ages the theologian and the mystic have told of such "disembodied spirits," postulated by the one, felt by the other, and now the psychical investigator with his automatic writing and his cross-correspondences is seeking to give us rigorous demonstration of them. If such exist, they crown Life's progress..."