Whenever you find yourself doubting how far you can go, just remember how far you have come.

Nothing is impossible if you want it badly enough. Impossible = I'm possible.

Don’t be afraid to work hard and find out how good you can really be.

We all have two lives. The second begins when we realise we only have one. 

Failure is not the opposite of success, it is part of the success.

The boxer is not afraid of being knocked down, he is afraid of not being able to get up again.

Fall down seven times, stand up eight.

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.

99% of genius comes from hard work, the remaining 1% comes from innate talent

Knowledge is of no value unless you put it into practice.

If you can understand just one thing thoroughly, then you will understand everything.

The greatest enemy to human potential is your comfort zone

Try and do one thing each day that you would really rather not do.

In order to become better than anybody else you must first become better than yourself.

It is never too late to become what you might have been