I regard the theatre as the greatest of all art forms, the most immediate way in which a human being can share with another the sense of what it is to be a human being.
All that day she had had the feeling that she was playing in the theatre with actors better than herself and that her poor playing spoiled the whole thing.
I've learned, having been on a lot of sets, the good news is that by definition you are surrounded by experts. They get fired if they're not - unlike in the theatre!