"In classical Chinese philosophy there are two contrary principles, the
bright yang and the dark yin. Of these it is said that always when
one principle reaches the height of its power, the counter-principle
is stirring within it like a germ. This is another, particularly
graphic formulation of the psychological law of compensation by an
inner opposite. Whenever a civilization reaches its highest point,
sooner or later a period of decay sets in. But the apparently
meaningless and hopeless collapse into a disorder without aim or
purpose, which fills the onlookers with disgust and despair,
nevertheless contains within its darkness the germ of a new light."
- C. G. Jung CW 10 Para. 295