Man lives amidst shadows. He creates opinions about things that he is not even sure if they exist. And even these things are not entirely real. The scientist can transcend the flawed world of the senses — of the things as they appear to us — and elaborate hypotheses about reality. But only the philosopher comes to see the light and, from it, he can see things as they really are. This is the Platonic theory about the world, a fascinating blend of theory of knowledge and metaphysics.