When you have exhausted all possibilities, remember this, you haven’t.

I’ve never made a mistake. I’ve only learned from experience.

Never get discouraged if you fail. Learn from it. Keep trying.

I find out what the world needs. Then I go ahead and try to invent it.

You can’t realize your dreams unless you have one, to begin with.

Good fortune often happens when opportunity meets with preparation.

Maturity is often more absurd than youth and very frequently is most unjust to youth.

To invent, you need a good imagination and a pile of junk.

The thing I lose patience with the most is the clock. Its hands move too fast.

We don’t know a millionth of one per cent about anything.

Hell, there are no rules here - we’re trying to accomplish something.

A genius is often merely a talented person who has done all of his or her homework.

Your worth consists in what you are and not in what you have.

The world owes nothing to any man, but every man owes something to the world.

Fools call wise men fools. A wise man never calls any man a fool.

The silver trump of freedom roused in my soul eternal wakefulness.

Interpreted as it ought to be interpreted, the constitution is a Glorious Liberty Document!

You have to take power. No one gives it.

I know of no rights of race superior to the rights of humanity…