The real test is this one: When you're alone in a room, when you're in a private place and nobody else can see you, what do you choose to do? Eat well, or eat poorly? Exercise, or watch television? Practice something, or do nothing? The best version of the truth appears to you and you alone, when nobody else can see. This is the test of discipline, and it's what makes the difference in your life. It's what regulates your own system and guides it. The individual alone comprehends it.

I was a big fan of Jean-Claude Van-Damme growing up, and I always wanted to be a martial artist 'cause of him.

People often say, 'Ah, ultimate fighting is so violent,' but it's rooted in martial arts. Martial arts incarnate respect. You can't walk into a dojo and say to your sensei, 'Hey, salut tabarnac!' After every one of my fights I go and shake the hand of my opponent. I don't need to hate the other fighter to fight him well. It's a sport.

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.

Respect is the most important thing. Be respectful toward others and have respect for yourself.

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.

With discipline, belief, and the right knowledge, we become the best we can be.