Since 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 one and the same thing.

The synchronicity phenomena point in this direction, for they show that the nonpsychic can behave like the psychic, and vice versa, without there being any causal connection between them.

Our present knowledge does not allow us to do much more than compare the relation of the psychic to the material world with two cones, whose apices, meeting in a point without extension—a real zero-point—touch and do not touch.

Psyche cannot be totally different from matter, for how otherwise could it move matter? And matter cannot be alien of psyche, for how else could matter produce psyche?

In archetypal conceptions and instinctual perceptions, spirit and matter confront one another on the psychic plane.

Matter and spirit both appear in the psychic realm as distinctive qualities of conscious contents.

The ultimate nature of both is transcendental, that is, irrepresentable, since the psyche and its contents are the only reality which is given to us without a medium.

– Carl Jung