The limits of the possible can only be defined by going beyond them into the impossible.

You are not here merely to make a living. You are here in order to enable the world to live more amply, with greater vision, with a finer spirit of hope and achievement. You are here to enrich the world, and to impoverish yourself if you forget the errand.

The question isn't who is going to let me; it's who is going to stop me.

We have been called to heal wounds, to unite what has fallen apart, and to bring home those who have lost their way.

It's always too early to quit.

What does not destroy me, makes me strong.

To be a great champion you must believe you are the best. If youre not, pretend you are.

If my life is going to mean anything, I have to live it myself.

It's all to do with the training: you can do a lot if you're properly trained.

Laziness is nothing more than the habit of resting before you get tired.

Live as if you were to die tomorrow. Learn as if you were to live forever.

Dare to be free, dare to go as far as your thought leads, and dare to carry that out in your life.

I am always doing what I cannot do yet, in order to learn how to do it.

The great secret of true success, of true happiness, is this: the man or woman who asks for no return, the perfectly unselfish person, is the most successful.

Scar tissue is stronger than regular tissue. Realize the strength, move on.

Freedom from the desire for an answer is essential to the understanding of a problem.

I'm sorry I wrote you such a long letter; I didn't have time to write a short one.

What I stand for is what I stand on.

When they say the sky's the limit to me that's really true

One man with courage is a majority.

All the darkness in the world cannot extinguish the light of a single candle.