You must believe in yourself and in your work. When our first Batman movie broke all those box-office records, I received a phone call from that United Artists exec who, years before, had told me I was out of my mind. Now he said, “Michael, Im just calling to congratulate you on the success of Batman. I always said you were a visionary.” You see the point here — dont believe them when they tell you how bad you are or how terrible your ideas are, but also, dont believe them when they tell you how wonderful you are and how great your ideas are. Just believe in yourself and youll do just fine. And, oh yes, dont then forget to market yourself and your ideas. Use both sides of your brain.
You must have a high threshold for frustration. Take it from the guy who was turned down by every studio in Hollywood. You must knock on doors until your knuckles bleed. Doors will slam in your face. You must pick yourself up, dust yourself off, and knock again. Its the only way to achieve your goals in life.