Our children long for realistic maps of the future that they can be proud of. Where are the cartographers of human purpose?

What an astonishing thing a book is.

I maintain there is much more wonder in science than in pseudoscience. And in addition, to whatever measure this term has any meaning, science has the additional virtue, and it is not an inconsiderable one, of being true.

We live at a moment when our relationships to each other, and to all other beings with whom we share this planet, are up for grabs.

All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year. Not all bits have equal value.

We are at a crossroads in human history. Never before has there been a moment so simultaneously perilous and promising. We are the first species to have taken evolution into our own hands.

Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.