If we do not do something to help these creatures, we make a mockery of the whole concept of justice.

There are an awful lot of scientists today who believe that before very long we shall have unraveled all the secrets of the universe. There will be no puzzles anymore. To me, it'd be really, really tragic because I think one of the most exciting things is this feeling of mystery, feeling of awe, the feeling of looking at a little live thing and being amazed by it and how it has emerged through these hundreds of years of evolution and there it is and it is perfect and why.

I still think we are smart enough to not destroy planet Earth, our only home.

Louis [Leakey] was anxious to initiate a scientific study of these chimpanzees. It would be difficult, he emphasized, for nothing was known; there were no guidelines for such a field study; and the habitat was remote and rugged. Dangerous wild animals would be living there, and chimpanzees themselves were considered at least four times stronger than humans. I remember wondering what kind of scientist he would find for such a herculean task.

Well, in some ways we're not successful at all. We're destroying our home. That's not a bit successful.

We find animals doing things that we, in our arrogance, used to think was "just human".

Having respect for animals makes us better humans.