It might not be a coincidence after all, that the theatre stage is a dark enclosed space, but when the lights are turned on, the actors’ job is to bring their truth on the stage. The difference between actors and audience is that actors are people who dare to open up their soul and let their truth out. The audience laughs, cries or thinks ‘Oh, my God, that’s me!’, but they would never dare to show that vulnerable part of themselves. At the beginning stages of theater in Ancient Greece, they invented the term catharsis or katharsis, which means "purification" or "cleansing." It's the purification and purgation of emotions, especially pity and fear; through art or any extreme change in emotion resulting in renewal and restoration. Catharsis in Ancient Greece was associated with God coming down on them. And what is God? He is the Light. He is the Truth.