Now, as the world's largest economy and as the world's second largest emitter, America bears our responsibility to address climate change, and we intend to meet that responsibility.

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.

If I don't get paid I'm going to take a whole lot of Marshall amps home with me on the plane.

The world is darkness; knowledge is light; but knowledge without truth is a mere shadow.

Structure your presentation so that you appeal to the different interests of the different decision-makers involved.

English? Who needs to spend time learning that? I'm never going to England!

So many heads so many wits.

I personally call the type of government which can be removed without violence 'democracy,' and the other, 'tyranny.'.

Twenty years and $40 billion. They seem like good round numbers.

Why do you all push us around?

I love you, I love you, I love you! And if you ever die on me again, I'll kill you so dead! (Tabitha)

I am strong, determined, impulsive, happy, and emotional.