I don't know what it is, truthfully, I think part of it is being still and all that. I don't know. I like to kind of come in at the side door. I like to act like a submarine; just don't do much and just let it evolve. It's resisting the urge to push the envelope. It's very difficult for an actor to avoid, you want to show a bit. But I think the less one shows the better
Anthony Hopkins on the secret of his spooky success: 'I like to act like a submarine' (February 11, 2010)