"Mental toughness is a lifestyle. It's something that you live every single day of your life."

"A warrior is not a person that carries a gun. The biggest war you ever go through is right between your own ears. It's in your mind. We're all going through a war in our mind, and we have to callus our mind to fight that war and to win that war."

"You have to be willing to go to war with yourself and create a whole new identity."

"I had a rough childhood coming up, and I just took all that negative energy and made it very positive for myself to drive me."

"I'm different than most people. When I cross the finish line of a big race, I see that people are ecstatic, but I'm thinking about what I'm going to do tomorrow."

"Remembering what you've been through and how that has strengthened your mindset can lift you out of a negative brain loop and help you bypass those weak, one-second impulses to give in."

"If you sit there and have that mentality of 'triple down on what you're good at,' you're never going to grow."

"I swam underwater for 50 meters at a time and walked the length of the pool underwater, with a brick in each hand, all on a single breath."

"The only way you gain mental toughness is to do things you're not happy doing. If you continue doing things that you're satisfied and make you happy, you're not getting stronger."

"I'm a big believer in doing things that make you uncomfortable. So, we live in a world where we want to be as comfortable as we can. And we wonder why we have no growth."

"Boot camp sucks - SEAL training sucks - but you know what? That's what makes you good."

"It's like a muscle - if you stop going to the gym or stop running, you get weak. The military teaches you these great values, but we don't keep up the discipline on our own, and we lose it."

"I lived a sloppy life. So I took very small increments in my life. I started making my bed. I started cleaning my room. There were dishes in the sink. It started off with doing small house chores."

"If you choose to do something, attack it. You can hate me, but there's one thing you can't say about me - that I didn't attack it."

"Our whole life is set up in the path of least resistance. We don't want to suffer. We don't want to feel discomfort. So the whole time, we're living our lives in a very comfortable area. There's no growth in that."

"The reason I became 297 pounds is because that was comfortable. What was very uncomfortable was running. What was very uncomfortable was being on a diet. What was very uncomfortable was trying to face things that I didn't want to face."

"When you're in hell, you forget how great you really are because you're suffering and you forget the great things you've done."