John Brockman, This Explains Everything: 150 Deep, Beautiful, and Elegant Theories of How the World Works

The universe consists primarily of dark matter. We can’t see it, but it has an enormous gravitational force. The conscious mind—much like the visible aspect of the universe—is only a small fraction of the mental world. The dark matter of the mind, the unconscious, has the greatest psychic gravity. Disregard the dark matter of the universe and anomalies appear. Ignore the dark matter of the mind and our irrationality is inexplicable. [source] 
JOEL GOLD Psychiatrist; clinical associate professor of psychiatry, NYU School of Medicine