When every physical and mental resource is focused, one's power to solve a problem multiplies tremendously.

Everything I've ever done was out of fear of being mediocre.

There is no passion to be found playing small - in settling for a life that is less than the one you are capable of living.

A man may die, nations may rise and fall, but an idea lives on.

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

What lies behind us and what lies before us are tiny matters compared to what lies within us.

United we stand; divided we fall.

A liar will not be believed even when he speaks the truth.

And, when you want something, all the universe conspires in helping you to achieve it.

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

Be miserable. Or motivate yourself. Whatever has to be done, it's always your choice.

We were a family who had come from nothing and now we had respect from French people of all sorts.

Perseverance and spirit have done wonders in all ages.

A pure hand needs no glove to cover it.

No one is free who has not obtained the empire of himself. No man is free who cannot command himself.

I don't think necessity is the mother of invention. Invention ... arises directly from idleness, possibly also from laziness. To save oneself trouble.

If we ever forget that we're one nation under God, then we will be one nation gone under.

What I stand for is what I stand on.

I can never stand still. I must explore and experiment. I am never satisfied with my work. I resent the limitations of my own imagination.

All thinking men are atheists.

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