When you make a mistake, take another chance. Only when you choose not to do so do you fail.

The journey of a thousand miles begins with one step. 

Just stick with it, what seems hard now will one day be your warm up.

If you fail, next time fail better.

The master has failed more times than the beginner has even tried

Success is not final, failure is not fatal.  It is the courage to continue that counts.

Don't expect to be good at maths or understand things straight away. Be patient and persistent. Rome wasn't built in a day, but they worked on it every single day. 

Time is your friend, impulse is your enemy.

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

Everything you want is on the other side of fear

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

You cannot escape the responsibility of tomorrow by evading it today

Twenty years from now you will be more disappointed by the things you didn’t do than the things you did do

We learn more from failure than we do from success.

You cannot start the next chapter of your life if you keep re-reading the last one.