You got to get it while you can.
I not only use all the brains that I have, but all that I can borrow.
If you can accept losing, you can't win.
The duty of youth is to challenge corruption.
I confess that in 1901 I said to my brother Orville that man would not fly for fifty years.
In life, you need either inspiration or desperation.
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.
People who say it cannot be done should not interrupt those who are doing it.
Out of suffering have emerged the strongest souls; the most massive characters are seared with scars.
Waste no more time arguing about what a good man should be. Be one.
Human dignity consists in the role we must play in our own perfection. Taking a role in our own self-completion is the highest expression of our creativity.
No matter what people tell you, words and ideas can change the world.
Great spirits have always encountered violent opposition from mediocre minds.
When obstacles arise, you change your direction to reach your goal; you do not change your decision to get there.
I'd rather be an optimist and a fool than a pessimist and right.
You shape your own destiny.
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.
Out of intense complexities intense simplicities emerge.
Winning isn't everything but wanting to win is.
If you're not prepared to be wrong, you'll never come up with anything original.
We cannot do everything at once, but we can do something at once.