If you want to make a [rhubarb] pie from scratch, first you have to create the universe.

We have heard the rationales offered by the nuclear superpowers. We know who speaks for the nations. But who speaks for the human species? Who speaks for Earth?

Be grateful everyday for the brief but magnificent opportunity that life provides.

Science is much more than a body of knowledge. It is a way of thinking. This is central to its success. Science invites us to let the facts in, even when they don't conform to our preconceptions. It counsels us to carry alternative hypotheses in our heads and see which ones best match the facts. It urges on us a fine balance between no-holds-barred openness to new ideas, however heretical, and the most rigorous skeptical scrutiny of everything - new ideas and established wisdom.

Accommodation to change, the thoughtful pursuit of alternative futures are keys to the survival of civilization and perhaps of the human species.

There are lots of ways to communicate what we know, but few ways to communicate what we feel. Music is one way to communicate emotions.

Ask courageous questions. Do not be satisfied with superficial answers.