Don’t hang your targets after you’re done shooting.

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

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

If you fail, next time fail better.

Try and do one thing each day that you would really rather not do.

A hero is no braver than an ordinary man, but he is braver five minutes longer.

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

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

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

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

Hard work always pays off - it is not a question of if you will get there, but WHEN you will get there

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

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

I think, therefore I am.

You're not in competition with anyone but yourself. Outdo your past, not other people.