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

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

Success is a journey, not a destination.

There is great wisdom in being able to realise that you don’t understand something before it goes too far.

We learn more from failure than we do from success.

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

A book a day keeps the stupidity away.

1.00³⁶⁵=1 and 1.01³⁶⁵=37.7. Doing nothing at all versus small steps at a time. 

I have not failed, I've just found 10,000 ways that won't work.

If you want to succeed, double your failure rate.

I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.

Time is your friend, impulse is your enemy.

Nobody said it’d be easy, they just promised it would be worth it.

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

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