Zarathustra's Roundelay is a poem that figures as a central motif in the 1883-1885 book Thus Spoke Zarathustra by Friedrich Nietzsche. “O man! Attend! What does deep midnight's voice contend? I slept my sleep, And now awake at dreaming's end: The world is deep, And deeper than day can comprehend. Deep is its woe, Joy—deeper than heart's agony: Woe says: Fade! Go! But all joy wants eternity, Wants deep, wants deep eternity.” ― Friedrich Nietzsche, Thus Spoke Zarathustra