The erotic instinct is something questionable. It belongs, on the one hand, to the original animal nature of man. On the other hand, it is connected with the highest forms of the spirit. But it blooms only when the spirit and instinct are in true harmony. If one or the other aspect is missing, then an injury occurs. Too much of the animal disfigures the civilized human being, too much culture makes a sick animal.

– Carl Gustav Jung

C. G. Jung instinct quote spirit