 And then he gets everybody together to see the play that these actors are going to put on. And they go through the exact steps that Claudius went through when he murdered his father. And it's too much for the king. Hamlet had said earlier, the play is the thing wherein I'll catch the conscience of the king. And that's exactly what he does. The king jumps up and rushes out saying, give me light. It's a great symbol for light that is more than merely physical.