Sisyphus

The myth tells of a plight:
Sisyphus pushes a boulder
Up the hill with all his might
Crunching all the muscles in his shoulder.
But he reaches the top
And the boulder rolls down
And he knows that it was a flop.
All he can do is frown
And start all over again,
Pushing the boulder all the way up,
Enduring all the pain
With the constant thought of giving up.
But what makes him continue to do so?
Absurdity! He could have stopped the flow.