the.com/eternal return

means The idea that the universe and everything in it repeats itself infinitely, so every choice you make is one you're condemned—or invited—to make again and again for eternity.

from The concept has ancient roots in cyclical cosmologies found in Stoic philosophy and various Eastern traditions (notably ideas of cosmic cycles in Hindu and Buddhist thought), where time loops rather than runs straight. But the phrase as a modern philosophical weapon comes from Friedrich Nietzsche, who presented it in 'The Gay Science' and 'Thus Spoke Zarathustra' in the 1880s not as cosmology but as an ethical test: a demon whispers that you must live this life, unchanged, over and over forever — and the question is whether you'd crumble at the thought or affirm it so completely you'd wish for nothing else.