Nietzsche linked this to amor fati, or love of fate. It asks if someone would embrace reliving their exact life, including every pain and joy, without changing anything.

This hypothesis suggests that because matter is finite but time is infinite, all physical configurations must eventually reoccur exactly as they have before.

This symbol is known as the Ouroboros. Originating in ancient Egyptian iconography, it represents the endless cycle of destruction and rebirth inherent to the cosmos.

He describes the demon creeping into a person's loneliest moments. This startling imagery frames the concept as a psychological test of ultimate life affirmation.