Plato

Plato uses the myth of the cave to address several important concerns of philosophy, the role of the philosopher and his journey to Knowledge. The story presents a group of men living in an underground cave. They are chained to a wall such that they can only see the back wall of the cave. There is only one entrance to the cave, and it is behind them on top of the wall they are chained …

…his faith in God might be the biggest trick of them all. He bases all his arguments with the presumed existence of God. With this presumption, he goes on to prove his own existence and then summarily to prove the existence of God. This is basically a logical circle that doesn’t prove or disprove anything new. It’s simply an exercise in logic that begins with a presumption and ends with the same conclusion.