Acting is not about dressing up. Acting is about stripping bare. The whole essence of learning lines is to forget them so you can make them sound like you thought of them that instant.
“When you're not involved, other people's unhappiness seems to be about the funniest damn thing on earth because you think you can solve it, that you are God, that you are above this, and that their unhappiness is just such useless toil and agony. If it's you, it ceases to be a comedy.”