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

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

Tough times never last, but tough people do.

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

There is no talent here. There is hard work and obsession. You could be anyone if you put in the time.

You can pick up a mistake and carry it as a burden,  or you can set it down as use it as a stepping stone to greatness.

Start, struggle, fail, fix and learn. Repeat.

Don't put off until tomorrow what you can do today. If today you have no time, it means tomorrow you'll be too tired and the next day you'll be something else.

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

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

Don’t practice until you get it right, practice until you can’t get it wrong.

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

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

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

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.