In The Odyssey, Homer’s classic work from circa 800 BC, the hero Odysseus faces many perils and tests on his return home from the Trojan War. At one point his ship must pass the Sirens whose haunting voices lure sailors to their death on the rocks near shore. Odysseus wants to hear the Sirens so he puts wax in his men’s ears and ties himself to the ship’s mast so he can safely hear the Sirens’ singing without going mad. He knew willpower alone wasn’t enough to overcome the Sirens’ temptation.