Waste no tears over the griefs of yesterday.
Terrorism is usually fueled by poverty, and the fanatical faith of the terrorists who truly believe that the more people they kill who do not subscribe to their faith, the greater their reward in heaven.
I started as - well, I wanted to be Poet Laureate. And I wanted to be a naturalist. That's how I began. I didn't have any desire to go and be a scientist. Louis Leakey channeled me there. I'm delighted he did. I love science. I love analyzing and making sense of all these observations. So, it was the perfect rounding off of who I was into who I am.
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.
It was both fascinating and appalling to learn that chimpanzees were capable of hostile and territorial behavior that was not unlike certain forms of primitive human warfare.
There isn't a sharp line dividing humans from the rest of the animal kingdom. All the time, we find animals doing things that, in our arrogance, we thought were just human.
From my perspective, I absolutely believe in a greater spiritual power, far greater than I am, from which I have derived strength in moments of sadness or fear. That's what I believe, and it was very, very strong in the forest.
What a difficult thing it is to ask someone's advice on a matter without coloring his judgment by the way in which we present our problem.
I grew up singing in Kansas. My dad had a band when I was growing up. So I sang in church and school and started singing with his band when I was seven. So I've been singing all my life.
For though we may be the Earth's gardeners, we are also its weeds. And we won't get anywhere until we come to terms with this crucial ambiguity about our role - that we are at once the problem and the only possible solution to the problem.
If you're just really loud, people just want - will give you what you want just to get you to shut up.