From my perspective, I absolutely believe in a greater spiritual power, far greater than I am, from which I have derived strength in moments of sadness or fear. That's what I believe, and it was very, very strong in the forest.

I got to Africa. I got the opportunity to go and learn, not about any animal, but chimpanzees. I was living in my dream world, the forest in Gombe National Park in Tanzania. It was Tanganyika when I began.

I had this wonderful, supportive mother who didn't get mad because of all the earth mucking up my bed. She just said they'd die - they needed the earth.

Your life matters. You can't live through a day without making an impact on the world. And what's most important is to think about the impact of your actions on the world around you.

Some humans are mathematicians-others aren't.

It's not a pretty picture, but there are reasons for hope.

If only we can overcome cruelty, to human and animal, with love and compassion we shall stand at the threshold of a new era in human moral and spiritual evolution - and realize, at last, our most unique quality: humanity.