Mistakes have the power to turn you into something better than you were before.

Work like you don't need the money, dance like nobody's watching and love like you've never been hurt. 

Mathematics Is not a spectator sport. The only way to learn mathematics is to do mathematics.

I think, therefore I am.

The greatest mistake we make is living in constant fear that we will make one.

No matter how bad it gets, you’re still way ahead of those who haven’t even started.

Your attitude is everything. Pick a good one.

You cannot escape the responsibility of tomorrow by evading it today

The temptation to quit will be the greatest when you are about to succeed

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

Tough times never last, but tough people do.

Don’t hang your targets after you’re done shooting.

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

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.

Be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.