Seven years after his death, his words still ring true:
I never give my work to somebody else and say, "What do you think about that?" I just don't trust anybody. If I think it's funny, or if I think it's silly, I send it in anyway because I'm just trying to please myself. I never try to please a certain audience. I think that's disastrous. There's no way in the world you can anticipate what your reader is going to like or dislike.