What a marvelous cooperative arrangement - plants and animals each inhaling each other's exhalations, a kind of planet-wide mutual mouth-to-stoma resuscitation, the entire elegant cycle powered by a star 150 million kilometers away.

we make our world significant by the courage of our questions and the depth of our answers

A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.

Clutching our crystals and religiously consulting our horoscopes, our critical faculties in steep decline, unable to distinguish between what's true and what feels good, we slide, almost without noticing, into superstition and darkness.

Science is only a Latin word for knowledge

Not explaining science seems to me perverse. When you're in love, you want to tell the world.

You could just as well say that an agnostic is a deeply religious person with at least a rudimentary knowledge of human fallibility.