If a man insisted always on being serious, and never allowed himself a bit of fun and relaxation, he would go mad or become unstable without knowing it.
Herodotus of Halicarnassus (Greek: Ἡρόδοτος, Hēródotos) (c. 484 BC – c. 425 BC)
Orion's Cold Fire
All the Secrets of the Universe and Some Really Important Stuff Too!