My mother always taught us that if people don't agree with you, the important thing is to listen to them. But if you've listened to them carefully and you still think that you're right, then you must have the courage of your convictions.

When you borrow you plan to pay back. We're stealing from our children - so many people have no intention of paying back.

It may sound trite, but young people really are the future.

I thought my life was mapped out. Research, living in the forest, teaching and writing. But in '86 I went to a conference and realised the chimpanzees were disappearing. I had worldwide recognition and a gift of communication. I had to use them.

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

Above all we must realize that each of us makes a difference with our life. Each of us impacts the world around us every single day. We have a choice to use the gift of our life to make the world a better place - or not to bother

A good mother is protective but not over-protective. She's patient, she's affectionate, she's playful, but above all she is supportive.