The ancient Greek storytellers had keen insights on human psychology. The myth of Sisyphus, a legendary king who played a few tricks on the gods, provides one such example. For his crimes against the gods, he was condemned to a particularly nasty form of hard labor, forced to roll a heavy stone to the top of a hill, only to see the boulder roll right back down as he reached the summit. His eternal punishment was not only physically wearing, but rendered his efforts utterly