Courage is the most important of all the virtues, because without courage you can't practice any other virtue consistently. You can practice any virtue erratically, but nothing consistently without courage.
Keep your face always toward the sunshine - and shadows will fall behind you.
All thinking men are atheists.
The deeds you do may be the only sermon some persons will hear today.
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.
The fact that the great scientist believed in flying machines was the one thing that encouraged us to begin our studies.
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.
When you believe in a thing, believe in it all the way, implicitly and unquestionably.
When everything seems to be going against you, remember that the airplane takes off against the wind, not with it ....
You say I started out with practically nothing, but that isn't correct. We all start with all there is, it's how we use it that makes things possible.
If you want a thing done well, do it yourself.
A bird doesn't sing because it has an answer, it sings because it has a song.
The men who have succeeded are men who have chosen one line and stuck to it.
Never look back unless you are planning to go that way.
However difficult life may seem, there is always something you can do and succeed at.
You can't learn in school what the world is going to do next year.
Memories of our lives, of our works and our deeds will continue in others.
I'd rather be an optimist and a fool than a pessimist and right.
Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.
You must never be fearful about what you are doing when it is right.
If we want a free and peaceful world, if we want to make the deserts bloom and man grow to greater dignity as a human being-we can do it.