A SISYPHEAN TASK (Sisyphus)
In Greek mythology, Sisyphus was a brilliant rascal who sometimes played tricks on the gods to get what he wanted. He even used trickery to avoid death. Finally the gods had enough and condemned Sisyphus to eternal hard labor -- his punishment: rolling a boulder up a hill, only to have it roll back down to the bottom each time he finally gets it to the top. It was intended to be not only difficult labor, but frustratingly futile, unrewarding, repetitive labor. The toil of Sisyphus is a metaphor for all difficult and repetitive labor that is frustrating and unrewarding.
(SOURCE: from a sermon by Daniel Villa, SermonCentral.com, "How to Pray Like Jesus" 6/29/08)