You've achieved success in your field when you don't know whether what you're doing is work or play.

Success is survival.

The appreciative smile, the chuckle, the soundless mirth, so important to the success of comedy, cannot be understood unless one sits among the audience and feels the warmth created by the quality of laughter that the audience takes home with it.

Your success depends mainly upon what you think of yourself and whether you believe in yourself.

The distance between insanity and genius is measured only by success.