The boxer is not afraid of being knocked down, he is afraid of not being able to get up again.

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

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

There are no bad mistakes in maths, only discoveries.

It always seems impossible until it's done.

Tomorrow is worth more than yesterday but less than today.

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

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

I can is 100 times more important than IQ.

Don’t be afraid to work hard and find out how good you can really be.

A book a day keeps the stupidity away.

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

Your attitude is everything. Pick a good one.

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

I think, therefore I am.