Acting is a very personal process. It has to do with expressing your own personality, and discovering the character you're playing through your own experience - so we're all different.
I'm not experienced enough, or certain enough of my acting on the screen to say to a director, "You are wrong, I am right. I will only do it this way." I could never feel that, I wish I could be absolutely certain. But on the stage, it's different. I know where I am on the stage.
When you were on stage, you could be absolutely open about your emotions and indulge them and express yourself in a way that - in real life - I wasn't doing.
My acting stopped being about disguise and became about truth which suits the camera, so my film career took off when I came out.
I don't make much distinction between being a stand-up comic and acting Shakespeare - in fact, unless you're a good comedian, you're never going to be able to play Hamlet properly.
For old actors, just remember that inside you're only 14. Acting is for kids. You poor old grown-ups, you've forgotten how to do what kids know automatically.
Macbeth is a very popular play with audiences. If you want to sell out a theater, just mount a production of Macbeth. It's a short play, it's an exciting play, it's easy to understand, and it attracts great acting.