Enantiodromia
Enantiodromia (Ancient Greek: ἐναντίος, romanized: enantíos – "opposite" and δρόμος, drómos – "running course") is a principle introduced in the West by psychiatrist Carl Jung. In Psychological Types, Jung defines enantiodromia as "the emergence of the unconscious opposite in the course of time." It is similar to the principle of equilibrium in the natural world, in that any extreme is opposed by the system in order to restore balance.