Plato’s Allegory of the Cave is an ancient attempt to describe the psychology of perception. A group of people who have lived chained to the wall of a cave all of their lives are facing a blank wall. The people watch shadows projected on the wall from objects passing in front of a fire behind them, and give names to these shadows. The shadows are the prisoners’ reality. In Plato’s allegory Socrates explains how the philosopher is like a prisoner who is freed from the cave and comes to understand that the shadows on the wall are not reality at all, for he can perceive the true form of reality rather than the manufactured reality that is the shadows seen by the prisoners.