Are you genuine? Or just an actor? A representative? Or what it is that is represented?-In the end, you might merely be someone mimicking an actor ... Second question of conscience.
Part of the work is determining through what instrument you are playing. Actors are physical, olympian storytellers and we should be able to create entire landscapes with nothing.
When I was a younger actor, I would try to keep it serious all day. But I have found, later on, that the lighter I am about things when I'm going to do a big scene that's dramatic and takes a lot out of you, the better off I am when I come to it.