I know now why you cry, but it's something I can never do.

I made my fair share of mistakes.

To go in the direction that I went takes a lot of work. And I don't think you can do the work - the five or six hours of working out a day - if you don't have a clear goal or know why you're doing it. If you just hang out at the gym and train for five or six hours a day without a goal is almost impossible.

I remember one guy, Reg Park, a British bodybuilder, who entered Mr Universe when he was very young. But he won it and continued to win it a second and third time. So, he was my idol. I read everything about Reg Park and followed his footsteps and trained like him. I said if he could make it, I could make it. It was a blueprint, basically, for how to get there, to win the championships.

When I was 15 years old I felt totally confident I would become a world champion and the greatest bodybuilder in the world. The same was true of show business - I knew that one day I would make more money than anyone else in the industry and I did. For that you need the willingness to work and do everything it takes to make the vision turn into reality.

The last three or four reps is what makes the muscle grow. This area of pain divides the champion from someone else who is not a champion. That's what most people lack, having the guts to go on and just say they'll go through the pain no matter what happens.

I have plenty of money, unlike other Hollywood celebrities or athletes that have not invested well.