We live on a hunk of rock and metal that circles a humdrum star that is one of 400 billion other stars that make up the Milky Way Galaxy which is one of billions of other galaxies which make up a universe which may be one of a very large number, perhaps an infinite number, of other universes. That is a perspective on human life and our culture that is well worth pondering.

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.

The cure for a fallacious argument is a better argument, not the suppression of ideas.

The candle flame gutters. Its little pool of light trembles. Darkness gathers. The demons begin to stir.

There is every reason to think that in the coming years Mars and its mysteries will become increasingly familiar to the inhabitants of the Planet Earth.

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

Science is not only compatible with spirituality; it is a profound source of spirituality.