When you arise in the morning think of what a privilege it is to be alive, to think, to enjoy, to love ...

Be happy, but never satisfied.

If you're not prepared to be wrong, you'll never come up with anything original.

You can chain me, you can torture me, you can even destroy this body, but you will never imprison my mind.

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

I confess that in 1901 I said to my brother Orville that man would not fly for fifty years.

The starting point of all achievement is desire. Keep this constantly in mind. Weak desires bring weak results, just as a small amount of fire makes a small amount of heat.

Man needs his difficulties because they are necessary to enjoy success.

In a day, when you don't come across any problems - you can be sure that you are travelling in a wrong path.

Character isn't something you were born with and can't change, like your fingerprints. It's something you weren't born with and must take responsibility for forming.

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 don't realize how a man's whole life can be changed by one book.

First ask yourself: What is the worst that can happen? Then prepare to accept it. Then proceed to improve on the worst.

They say Rome wasn't built in a day, but I wasn't on that particular job.

You have brains in your head. You have feet in your shoes. You can steer yourself any direction you choose.

Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.

To see me does not necessarily mean to see my face. To understand my thoughts is to have seen me.

Great work requires great and persistent effort for a long time. … Character has to be established through a thousand stumbles.

Truth is like the sun. You can shut it out for a time, but it ain't goin' away.

Know thyself.

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