"An unenlightened man is like a man in a cave with his hands bound.

He is looking at the wall and seeing the spot of light from the entrance to the cave which is behind him.

You step into the dark cave, out of the light and try and tell the man there is more to his life than this.

But he exclaims almost like a madman that "He sees the light! He sees the light!",

looking at the beam of light on the wall...