"The greatest lesson I learned from the chimpanzees is that we are not so different from them."

"Every creature has a role to play in the ecosystem, and we need to respect that."

"My mother always told me that if I wanted to achieve something, I had to work hard and never give up."

"My life's work has been to try and help people understand that animals are not just things."

"We need to teach our children to be compassionate, and to care about all living things."