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

We must have perserverence and above all confidence in ourselves. We must believe that we are gifted for something.

It's not whether you got knocked down; it's whether you get back up.

I'm not telling you it's going to be easy - I'm telling you it's going to be worth it.

I am not what happened to me, I am what I choose to become.

Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.

Everything you can imagine is real.

Insanity is doing the same thing over and over again and expecting different results.

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

Treat a work of art like a prince. Let it speak to you first.

Alone we can do so little; together we can do so much.

Question with boldness even the existence of God; because, if there be one, he must more approve of the homage of reason than that of blindfolded fear.

Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present.

A pure hand needs no glove to cover it.

Do not worry about holding high position; worry rather about playing your proper role.

A man can't soar too high, when he flies with his own wings.

The secret of genius is to carry the spirit of the child into old age, which means never losing your enthusiasm.

I think nature's imagination Is so much greater than man's, she's never going to let us relax.

You lose nothing when fighting for a cause ... In my mind the losers are those who don't have a cause they care about.

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

You'll never do a whole lot unless you're brave enough to try.