A cockroach can’t defeat a dinosaur. But the cockroach is better at one thing, and it has ensured its survival through the ages: Adaptation. One could adapt to the environment and the other one couldn’t.

When I train, I love to take time off and fly to the Natural History Museum or an exhibition. I just love that. When you know your past, it will help you with your future… That’s why most of my friends are not fighters. Most of my friends are nerds like me. That’s why I have a hard time finding a girlfriend. I need someone to talk science with. I’m married to my work right now. But you never know. One day I could wake up and just do something different. Life is so unpredictable.

I will never take the fact that I am Welterweight Champion for granted. I learnt my mistake in the past. No matter how great, no matter how people tell me how great I am, I'm always one mistake away from losing everything.

The key to effective visualization is to create the most detailed, clear and vivid a picture to focus on as possible. The more vivid the visualization, the more likely, and quickly, you are to begin attracting the things that help you achieve what you want to get done.

There is a difference between a fighter and a martial artist. A fighter is training for a purpose: He has a fight. I’m a martial artist. I don’t train for a fight. I train for myself. I’m training all the time. My goal is perfection. But I will never reach perfection.

I will never blame a fighter if he doesn't fight me because he takes care of his own interest first, and prioritize the interests of his family first, that's completely normal.

You think I was born rich? I've worked really hard. You have no idea.