Some people actually do not like animals - hard for me to understand, but true.

I think the most important thing is to keep active, and to hope that your mind stays active.

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.

I still think we are smart enough to not destroy planet Earth, our only home.

Terrorism is fueled by hate. The tragedy is that there are countless young children who are being taught to hate. Terrorism is usually fueled also by poverty.

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

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?