You can't climb up to the second floor without a ladder. When you set your aim too high and don't fulfill it, then your enthusiasm turns to bitterness. Try for a goal that's reasonable, and then gradually raise it.

To boast of a performance which I cannot beat is merely stupid vanity. And if I can beat it that means there is nothing special about it. What has passed is already finished with. What I find more interesting is what is still to come.

When I was young, I was too slow. I thought I must learn to run fast by practicing to run fast, so I ran 100 meters fast 20 times. Then I came back, slow, slow, slow.

Why should I practice running slow? I already know how to run slow. I want to learn to run fast.

There were only 170 neurologists in Britain then and, whether spoken or unspoken, there was this insidious feeling. How can Bannister, a mere athlete, probably spoilt by all the publicity and fame, dare aspire to neurology? But I'd done a lot of research, and my academic record was very good.

Quality training is what I do now; before it was a combination of both quality and quantity. Now I'm not trying to be a world-class athlete, I don't need to train at that level. It's about being fit, fit for life.

It's always been such a big part of my life to be fit and healthy and be outside and run and play sports. It gives me energy. Sometimes, I have these days where I don't do anything because I have the days off, and I just need to relax, and I actually get more tired.

I've been engulfed in sports since I was a 2-year-old; I picked up any kind of ball - a basketball, baseball, football - I just loved to play something. I loved the energy of being in arenas and watching the game on TV.