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

Don't put off until tomorrow what you can do today. If today you have no time, it means tomorrow you'll be too tired and the next day you'll be something else.

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

Everything you want is on the other side of fear

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

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

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

I can is 100 times more important than IQ.

I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.

The greatest enemy to human potential is your comfort zone

Nothing is impossible if you want it badly enough. Impossible = I'm possible.

The journey of a thousand miles begins with one step.

Time is your friend, impulse is your enemy.

Failure to prepare = preparing to fail

Your limitation - its only your imagination.