In a conflict between the heart and the brain, follow your heart.

Don't ever take a fence down until you know why it was put up.

If the only tool you have is a hammer, you tend to see every problem as a nail.

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

If you are humble nothing will touch you, neither praise nor disgrace, because you know what you are.

You have to make the rules, not follow them.

Defeat is not defeat unless accepted as a reality-in your own mind.

Nothing great was ever achieved without enthusiasm.

If you don't know, the thing to do is not to get scared, but to learn.

My optimism wears heavy boots and is loud.

I long to accomplish a great and noble task; but it is my chief duty to accomplish small tasks as if they were great and noble

Whatever you do will be insignificant, but it is very important that you do it.

Drink moderately, for drunkenness neither keeps a secret nor observes a promise.

We're lost, but we're making good time

The unexamined life is not worth living.

Instead of worrying about what people say of you, why not spend time trying to accomplish something they will admire

Believe you can and you're halfway there.

It's always too early to quit.

Out of your vulnerabilities will come your strength.

The best way out is always through.

First they ignore you, then they ridicule you, then they fight you, and then you win.