Each time that Sisyphus began to roll the boulder up the mountain was he aware before beginning the task that the boulder would roll back down once he had finished? In other words, in addition to being compelled to undertake a task that he could never complete, was he also given the additional burden of knowing he was engaged in a futile task? Will you please refer me to any resources you have used to support your conclusion?
Although I can imagine the gods having the power implant a desire in a man, I find it more difficult to believe (based on my limited education on the topic) that they can force a man to do something against his will. So, if the gods can force a man to do something against his will, can you provide other examples of where they have been so?