The greatest enemy to human potential is your comfort zone

He who has begun his task is half-way done. Have the courage to begin!

Don't fear failure, fear being in the same exact same place next year as you are now.

The master has failed more times than the beginner has even tried

If you can understand just one thing thoroughly, then you will understand everything.

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

It is never too late to become what you might have been

You cannot escape the responsibility of tomorrow by evading it today

Twenty years from now you will be more disappointed by the things you didn’t do than the things you did do

99% of failures come from people who have the habit of making excuses.

Success is a journey, not a destination.

The easiest person to deceive is yourself.

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

Failure to prepare = preparing to fail

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