Insanity is doing the same thing over and over again and expecting different results.

The question isn't who is going to let me; it's who is going to stop me.

The unexamined life is not worth living.

You can't learn in school what the world is going to do next year.

Nobody can hurt me without my permission.

When obstacles arise, you change your direction to reach your goal; you do not change your decision to get there.

The superior man thinks only of virtue; the common man thinks only of comfort.

I can never stand still. I must explore and experiment. I am never satisfied with my work. I resent the limitations of my own imagination.

We need never be ashamed of our tears.

A thing worth having is a thing worth cheating for.

The number one problem that keeps people from winning in the United States today is lack of belief in themselves.

You can wish for things in the future to be different, but in this moment you have to accept things as they are.

All wealth is the product of labor.

Be yourself, let you come through.

When I'm inspired, I get excited because I can't wait to see what I'll come up with next.

Improvement makes strait roads, but the crooked roads without Improvement, are roads of Genius.

We were a family who had come from nothing and now we had respect from French people of all sorts.

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.

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

People who say it cannot be done should not interrupt those who are doing it.

Give yourself something to work toward - constantly.