“A good feeling for me is when you train, and then you put on fresh clothes. New clothes after a training session - you have this rush of endorphins from exercise that everybody gets, and then you get that nice feeling of fresh clothes. It's a double whammy.”

“Competition gives me energy. It keeps me focused.”

“Even when I was a kid, everything I had was the best.”

“I don't feel bitterness, I don't feel anger towards anybody. Fighting is never emotional to me.”

“I don't feel pressure in a negative way. I like pressure. I feel excitement and calm at the same time. No pressure, no diamonds. I want pressure: pressure creates drama, creates emotion.”

“I don't look at a man who's expert in one area as a specialist. I look at him as a rookie in ten other areas.”

“I have a self-defense mind. I've had it all my life.”

“I have the greatest job in the world. I get paid loads of cash for beating the crap out of people. And I'm very good at it.”

“I like to look good, my friend.”

“I see fighters make funny videos about me and stick them on Facebook and get 20 likes. When I make a video, I sell it to Fox and make seven figures. That's the difference.”

“I take inspiration from everyone and everything. I'm inspired by current champions, former champions, true competitors, people dedicated to their dream, hard workers, dreamers, believers, achievers.”

“I train and I go home, and when I'm home, I think about training. That's my life every day, and that's it.”

“I'll die a crazy old man!”

“I'm just trying to be myself. I'm not trying to be anyone else.”

“It's good to make your brain work more than your body.”

“My success isn't a result of arrogance - it's a result of belief.”

“Ritual is another word for fear, manifested in a different way.”

“That's what I do this for, to secure my family's future. I don't care about anything else. I'm able to spoil people, and that's the best thing.”

“The thing about the truth is, not a lot of people can handle it.”

“There is definitely an addiction to money that I have.”

“Trash talk? Smack talk? This is an American term that makes me laugh. I simply speak the truth. I'm an Irish man.”

“We come bulletproof in Ireland. We're reared tough, and we fight.”

“What can I say? I'm a talker.”

“When I am free to train and free to move, I feel like a gorilla in the jungle. Then, when there are a bunch of media obligations, I feel like I have been captured and am being kept on display.”

“When I do something, I do it full steam ahead.”

“When I say something's going to happen, it's going to happen.”