I think, therefore I am.

Tough times never last, but tough people do.

Fall down seven times, stand up eight.

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

Dreams don't work unless you do.

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.

Pure mathematics is in its way, the poetry of logical ideas.

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

Skills are built not born.

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

Hard work beats talent when talent doesn't work hard.

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

It doesn’t matter where you start, it matters how you end

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

Instead of finding reasons why you can't, find reasons why you can.