What's the secret to the longevity of your career?

What's the secret to the longevity of your career?

William Shatner (Author) gives expert video advice on: Why did you become an actor?; What's the William Shatner 'Problem Solving' approach to acting?; How should an actor learn to embrace a role? and more...

I don't know, it's totally luck, certainly not by design. I'm a firm believer in the chaos theory and everything's chaotic and it just works. I think that there are parameters of existence, whatever that is. Whether it's an acting role, a star, I mean a celestial body. Everything has parameters that, in which they can live. Once you exceed those parameters, you cease to exist in that form.