The term "self" seems a suitable one for the unconscious substrate whose actual exponent in consciousness is the ego. The ego stands to the self as the moved to the mover, or as object to subject, because the determining factors that radiate outward from the self surround the ego on all sides and are therefore supraordinate to it. The self, like the unconscious, as an a priori existent out of which the ego evolves. It is, so to speak, an unconscious prefiguration of the ego. It is not I who create myself; rather, I happen to myself.
Carl JungSince psyche and matter are contained in one and the same world, and moreover are in continuous contact with one another and ultimately rest on irrepresentable, transcendental factors, it is not only possible but fairly probable, even, that psyche and matter are two different aspects of the same thing.
Carl Jung