I have never had an animal that didn't have a personality, one differing from another.

But does that mean that war and violence are inevitable? I would argue not because we have also evolved this amazingly sophisticated intellect, and we are capable of controlling our innate behavior a lot of the time.

It made me feel particularly sickened to know that this kind of callous attitude toward animals is repeated again and again in laboratories around this country.

I think the best evenings are when we have messages, things that make us think, but we can also laugh and enjoy each other's company.

When you meet chimps you meet individual personalities. When a baby chimp looks at you it's just like a human baby. We have a responsibility to them.

I think the most important thing is to keep active, and to hope that your mind stays active.

The only possible way to get somebody to change is to reach into their hearts.