We are citizens of the world. The tragedy of our times is that we do not know this.

If the little bit you have is nothing special in itself, at least find a way of saying it that is a little bit special.

We are what we repeatedly do. Excellence, then, is not an act, but a habit.

The present is theirs; the future, for which I really worked, is mine.

Winners and losers aren't born, they are the products of how they think

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

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

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

Argue not concerning God,re-examine all that you have been told at church or school or in any book, dismiss whatever insults your soul

When I go, God's going to have to give up his favourite chair.

Let yourself be silently drawn by the stronger pull of what you really love.

The fact that the great scientist believed in flying machines was the one thing that encouraged us to begin our studies.

Never trust the advice of a man in difficulties.

People often say that motivation doesn't last. Well, neither does bathing - that's why we recommend it daily.

They deem me mad because I will not sell my days for gold; and I deem them mad because they think my days have a price.

The desire to reach for the stars is ambitious. The desire to reach hearts is wise.

When you're curious, you find lots of interesting things to do.

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 expectations of life depend upon diligence; the mechanic that would perfect his work must first sharpen his tools.

What does not destroy me, makes me strong.

Status quo, you know, is Latin for 'the mess we're in'.