Without the heart to ground it and open it to who we really can be as human beings, the brain is a very dangerous machine. A machine that is saying: we've got to have economic growth; we've got to have unending economic growth, otherwise societies will collapse. And yet there should be something saying: wait a minute, this isn't going to work.

It's the bond between mother and child, which is really for us and for chimps and other primates, the root of all the expressions of social behavior.

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

I don't care two hoots about civilization. I want to wander in the wild.

If you work hard and be persistent, you will achieve whatever you want to do.

We now know that the structure of the DNA in humans and chimpanzees differs by only just over one percent. You could even have a blood transfusion from a chimp, provided you have the same blood group.

Our brain is almost the same as the chimps', but we have language, we have electronic communications, we've put people on the moon - we are immensely more intelligent. And yet: how come the being with the most extraordinary intellect ever is destroying its only planet?