Democracy cannot survive overpopulation.

Scientists derive satisfaction from figuring out the puzzle. It's about the quest, not the grail.

It is the obvious which is so difficult to see most of the time. People say 'It's as plain as the nose on your face.' But how much of the nose on your face can you see, unless someone holds a mirror up to you?

To surrender to ignorance and call it God has always been premature, and it remains premature today.

It is not only the living who are killed in war.

Tens of millions of Americans who neither know or understand the actual arguments for, or even against, evolution, march in the Army of the Night with their Bibles held high

Although we will hate and fight the machines, we will be supplanted anyway, and rightly so, for the intelligent machines to which we will give birth may, better than we, carry on the striving toward the goal of understanding and using the Universe, climbing to heights we ourselves could never aspire to.