Focus on progress, not perfection. Practise a little bit every day - little and often  Slow and steady wins the race.

It is never too late to turn an unproductive day into a productive one.

I think, therefore I am.

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

Dreams don't work unless you do.

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.

There are no bad mistakes in maths, only discoveries.

There are no shortcuts to any place worth going.

There is no elevator to success, you have to take the stairs.

I can is 100 times more important than IQ.

Everything you want is on the other side of fear

No one starts out on top. You have to work your way up.

Never underestimate the importance of small steps. small steps = big changes. 

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

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