Our mania for rational explanations obviously has its roots in our fear of metaphysics, for the two were always hostile brothers. Hence, anything unexpected that approaches us from the dark realm is regarded either as coming from outside and, therefore, as real, or else as a hallucination and, therefore, not true. The idea that anything could be real or true which does not come from outside has hardly begun to dawn on contemporary man.
Carl JungWe are so accustomed to the apparently rational nature of our world that we can scarcely imagine anything happening that cannot be explained by common sense. The primitive man confronted by a shock of this kind would not doubt his sanity; he would think of fetishes, spirits or gods
Carl JungInstead of being at the mercy of wild beasts, earthquakes, landslides, and inundations, modern man is battered by the elemental forces of his own psyche. This is the World Power that vastly exceeds all other powers on earth. The Age of Enlightenment, which stripped nature and human institutions of gods, overlooked the God of Terror who dwells in the human soul.
Carl Jung