We learn the social norms of our society and modify our behaviour accordingly.

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.

Researchers find it very necessary to keep blinkers on. They don't want to admit that the animals they are working with have feelings.

Having respect for animals makes us better humans.

Other people have talked about chimpanzees being a window into the past, which I suppose is true, in a way.

We have turned away from the natural world. Instead, it's all about money and power.

The problem of the chimps is that they can only sit and look. They can't discuss what they feel. All that feeling is trapped within each one.