I used to imagine it. I used to pretend that my Peugeot driving to the gym in the rain in Dublin was a Ferrari on the Vegas strip. And now that I have that? I can't even describe that feeling. That's why I like the best - the best cars, the best food, the best watches.

To do anything to a high level it has to be total obsession. Ask José Mourinho, he wouldn't know a thing about me, my sport - he knows football, and to get to high levels you have to be insane, nothing else means anything. I respect all forms of movement and lifestyles, but I am in a bubble. I wake up, it is in my head; I go to sleep, it's in my head, 24/7.

I don't care about anything I don't need to care about.

The surface below your feet is so special. It is not like a boxing ring, not like a wrestling mat, it's its own thing, and when I am there, I am floating, I am moving with total freedom, I am free. And when you know, when you just know you are going to win, like I do, there is no better feeling.

You need to be able to hit, kick, grapple, wrestle, but for me so much of this is about the mind, about feeling you are in complete control of the space around you, and you know what to do at any moment. That is a wonderful feeling, but it doesn't just happen, you have to work for it, train for it, think about it all the time.

I am in the fighting game, I don't care about anything else. I don't watch the news, I don't care about politics, I don't care about other sports. I don't care about anything I don't need to care about. This is my sport, it is my life. I study it, I think about it, all the time. Nothing else matters.

I believe in believing. My coach John Kavanagh is a big atheist and he is always trying to persuade people to his way of thinking, and I think what a waste of energy. If people want to believe in this god, or that god, that's fine by me, believe away. But I think we can be our own gods. I believe in myself.