Scientists have discovered that the small, brave act of cooperating with another person, of choosing trust over cynicism, generosity over selfishness, makes the brain light up with quiet joy.

As [The Nation columnist Katha] Pollitt points out, when one starts looking beneath the surface of things and adding together the out-front atheists with the indifferent nonbelievers, you end up with a much larger group of people than Jews, Muslims, Buddhists and Unitarians put together.

I may not believe in life after death, but what a gift it is to be alive now.

Astronomers are pure of heart and appealingly puerile. They look into the midnight sky and ask big questions, just as we did when we were in college: Who are we? Where do we come from? And why are we standing around outside on the night before finals, do we want to end up making elevator parts for a living like our father or what?

Who needs a handgun when you've got a semiautomatic?

Perhaps eggs are like neurons, which also are not replenished in adulthood: they know too much. Eggs must plan the party. Sperm need only to show up- wearing top hat and tails, of course.

Science is not a body of facts. Science is a state of mind. It is a way of viewing the world, of facing reality square on but taking nothing on its face. It is about attacking a problem with the most manicured of claws and tearing it down into sensible, edible pieces.