If you fail, next time fail better.

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

Your attitude is everything. Pick a good 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.

The bad news is time flies, the good new is that you're the pilot.

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

We learn more from failure than we do from success.

Tough times never last, but tough people do.

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

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

The wise person knows that no answer is also an answer

Practice like you’ve never won. Perform like you’ve never lost.

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

A book a day keeps the stupidity away.