I Believe This Is The Same Concept For People As Well.

"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."

by Carl Jung | Artwork by PhotoAllegory of Sarolta Bán