We have language and they do not. Chimps communicate by embracing, patting, looking - all these things. And they have lots of sounds. But they cannot sit and discuss. They cannot teach about things that are not present, as far as we know.

Let us develop respect for all living things. Let us try to replace violence and intolerance with understanding and compassion. And love.

I'm always pushing for human responsibility. Given that chimpanzees and many other animals are sentient and sapient, then we should treat them with respect.

I believe that the tragedy [like terror attack] that's caused so much grief and suffering to so many thousands and thousands of people has also served as a call to action, because many people now are re-examining their own value systems, and the churches, temples, mosques and cathedrals are packed to overflowing for the first time in years.

Chimps are very quick to have a sudden fight or aggressive episode, but they're equally as good at reconciliation.

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

The chimps' way of aggression is quick and brutal. I compare them to gang attacks.