We are steeped in a world that was created by our own psyche
Greater than all physical dangers are the tremendous effects of delusional ideas, which are yet denied all reality by our world-blinded consciousness. Our much vaunted reason and our boundlessly overestimated will are sometimes utterly powerless in the face of “unreal” thoughts. The world-powers that rule over all mankind, for good or ill, are unconscious psychic factors, and it is they that bring consciousness into being and hence create the sine qua non for the existence of any world at all. We are steeped in a world that was created by our own psyche.
- C.G. Jung, Collected Works, Vol 8, par 747