Imagine this..

Michael Checkhov said, "An actor is an imagination". Without it, every action will carry a cold mechanical weight. Through imagination we transform and transport ourselves; and the spectator along with us. We become free and responsive to the moment, as we do in life. This unpredictability is what excites and breathes life into a performance. 

Think of your favorite actors; they are most likely your favorite because they have an element of unpredictability, of danger to them. They are present with their surroundings...