There are good mothers and bad ones, but most of them are somewhere in-between.

I had a wonderful teacher about animal behavior - my dog Rusty. He taught me that animals have personalities, minds, and feelings.

You can't do everything. You can't do health and forestry and agriculture. You've got to focus and do one or the other.

You may not believe in evolution, and that is all right. How we humans came to be the way we are is far less important than how we should act now to get out of the mess we have made for ourselves.

Just think of the trust that often exists in soldiers. Within their own unit, you could say they have to trust each other. A spirit of camaraderie builds up and, in the end, they will risk their lives for each other. They may even go so far as to dehumanise the other, enemy group - a mechanism you can also observe in chimps.

It was because the chimps are so eye-catching, so like us and teach us so much that my work was recognised worldwide.

As thy days, so shall thy strength be.