We, as humans, have actually developed a sense of social responsibility. We have gone beyond our basic instincts.

And always I have this feeling--which may not be true at all--that I am being used as a messenger.

Researchers find it very necessary to keep blinkers on. They don't want to admit that the animals they are working with have feelings.

The hardest part of returning to a truly healthy environment may be changing the current totally unsustainable heavy-meat-eating culture of increasing numbers of people around the world. But we must try. We must make a start, one by one.

I sometimes wonder how some people can live with themselves in some of the big companies today. So many far-reaching decisions are based on how they will affect the next shareholders' meeting.

I've always felt you don't have to be completely detached, emotionally uninvolved to make precise observations. There's nothing wrong with feeling great empathy for your subjects.

I don't even think of chimps as animals. I think of them as beings.