Don't be afraid to take an unfamiliar path.  Sometimes they're the ones that lead you to the best places.

Practice makes comfort. Expand your experiences regularly so every stretch won't feel like your first.

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

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

We learn more from failure than we do from success.

The journey of a thousand miles begins with one step. 

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

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

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

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

You can have results or excuses, not both

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

You cannot escape the responsibility of tomorrow by evading it today

Failure to prepare = preparing to fail

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