I think, therefore I am.

Fall down seven times, stand up eight.

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

Your attitude is everything. Pick a good one.

Work on your weaknesses until they are your strengths and work on your strengths until they are second nature.

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

The greatest mistake we make is living in constant fear that we will make one.

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

Work ethic is important, because, unlike intelligence, athleticism, or charisma, or any natural attribute, it’s a choice.

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

If you really want something you’ll find a way. If you don’t you’ll find an excuse.

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

Yesterday is history, tomorrow is a mystery, but today is a gift—that's why it's called 'the present

Success is a journey, not a destination.

The journey of a thousand miles begins with one step.