"Human nature is potentially aggressive and destructive and potentially orderly and constructive."

"I was brought up to believe that the only thing worth doing was to add to the sum of accurate information in this world."

"Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has."

"We are now at a point where we must educate our children in what no one knew yesterday, and prepare our schools for what no one knows yet."

"One of the most dangerous things that can happen to a child is to kill or torture an animal and get away with it."

"Never doubt that a small group of thoughtful, committed, citizens can change the world. Indeed, it is the only thing that ever has."