Become a possibilitarian. No matter how dark things seem to be or actually are, raise your sights and see possibilities -- always see them, for they're always there.
I'll try anything once, twice if I like it, three times to make sure.
If my life is going to mean anything, I have to live it myself.
Don't fear failure. Not failure, but low aim, is the crime. In great attempts it is glorious even to fail.
The more you lose yourself in something bigger than yourself, the more energy you will have.
The one excellent thing that can be learned from a lion is that whatever a man intends doing should be done by him with a whole-hearted and strenuous effort.
There are no traffic jams on the extra mile.
You need a little bit of insanity to do great things.
I am as bad as the worst, but, thank God, I am as good as the best.
When everything seems to be going against you, remember that the airplane takes off against the wind, not with it ....
Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. Be curious.
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.
You'll never do a whole lot unless you're brave enough to try.
The best way to find yourself is to lose yourself in the service of others.
Somewhere, something incredible is waiting to be known.
Don't find fault, find a remedy; anybody can complain
My dear friend, clear your mind of cant.
No one is free who has not obtained the empire of himself. No man is free who cannot command himself.
To go too far is as bad as to fall short.
I confess that in 1901 I said to my brother Orville that man would not fly for fifty years.
You can't build a reputation on what you are going to do.