Our founders made it extraordinarily difficult to amend the Constitution.

You can’t let your failures define you. You have to let your failures teach you.

Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek.

Keep exploring. Keep dreaming. Keep asking why. Don’t settle for what you already know. Never stop believing in the power of your ideas, your imagination, your hard work to change the world.

When ignorant folks want to advertise their ignorance, you don't really have to do anything, you just let them talk.

Just because we have the best hammer does not mean that every problem is a nail.

Change is never easy, but always possible.

Don’t ever let anybody tell you that your efforts don’t matter or that your voice doesn’t count. Don’t ever believe that you can’t make a difference. You have.

Where you are right now doesn't have to determine where you'll end up.

Learning to stand in somebody else's shoes, to see through their eyes, that's how peace begins. And it's up to you to make that happen. Empathy is a quality of character that can change the world.

If somebody is different from you, that's not something you criticize, that's something that you appreciate.

Companies should be selling ideas more than benefits. Sell ideas. Not stuff.

My children were born into this. They will always be the grandchildren of the President and First Lady of the United States.

Work continuously to trim the White House staff from your first day to your last. All the pressures are to the contrary.

The most important thing about a fighter is something you can't see, and that's his heart.

Since I started in motor racing I've worked with people from all over the world. We are all here to go racing and prejudice will never play any part in that.

Before my diagnosis [cancer] I was a competitor but not a fierce competitor. When I was diagnosed, that turned me into a fighter.

The water which rises in the mountains is the blood which keeps the mountain in life.

Capitalism is an evil, and you cannot regulate evil. You have to eliminate it and replace it with something that is good for all people and that something is democracy.

Turn over the pages of history and read the damning record of the church's opposition to every advance in every field of science. . . .