We can't change the way Washington works unless we first change how Congress works.

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.

Fairy tales are more than true: not because they tell us that dragons exist, but because they tell us that dragons can be beaten.

God never talks. But the devil keeps advertising, Father. The devil does a lot of commercials.

Real mathematics must be justified as art if it can be justified at all.

Victory is the ability to fight five minutes longer than any other army in the world.

Engagement is the good life. What could be more exciting than getting involved in something that you care about and joining with others and seeing something change? What could be more thrilling?

The universe contains vastly more order than Earth-life could ever demand. All those distant galaxies, irrelevant for our existence, seem as equally well ordered as our own.

It is immoral to use private property in order to alleviate the horrible evils that result from the institutions of private property.

Dive today from the cliff of what you know into what you can't know.

Study after study shows that happiness precedes important outcomes and indicators of thriving.