Some people say, therefore, that violence and war are inevitable. I say rubbish: Our brains are fully capable of controlling instinctive behavior.

Never be arrogant or abrasive. Treat your opponent respectfully if they really and truly believe they are right.

The more we learn of the true nature of non-human animals, especially those with complex brains and corresponding complex social behavior, the more ethical concerns are raised regarding their use in the service of man - whether this be in entertainment, as "pets," for food, in research laboratories, or any of the other uses to which we subject them.

To me, trees are living beings and they have their own sort of personalities.

We are unique. Chimpanzees are unique. Dogs are unique. But we humans are just not as different as we used to think.

I think anything is better than war. The extent to which one can negotiate with fanatics, I have no idea. I don't know.

If you catch somebody doing something wrong, he will just cringe away and curl up. He will not listen anymore. Instead, he will think of how he can counterattack.