No one has the right to tell me what to do because he has a divine warrant.

It's surprising to me how many of my friends send Christmas cards, or holiday cards, including my atheist and secular friends.

There can be no progress without head-on confrontation.

The pre-history of our species is hag-ridden with episodes of nightmarish ignorance and calamity, for which religion used to identify, not just the wrong explanation, but the wrong culprit. Human sacrifices were made preeminently in times of epidemics, useless prayers were uttered, bogus miracles attested to, and scapegoats - such as Jews or heretics or witches - hunted down and burned.

We owe a huge debt to Galileo for emancipating us all from the stupid belief in an Earth-centered or man-centered (let alone God-centered) system. He quite literally taught us our place and allowed us to go on to make extraordinary advances in knowledge.

Skepticism rather than credulity is the highest principle that the human intellect can use to ennoble our existence.

The fragility of love is what is most at stake here—humanity's most crucial three-word avowal is often uttered only to find itself suddenly embarrassing or orphaned or isolated or ill-timed—but strangely enough it can work better as a literal or reassuring statement than a transcendent or numinous or ecstatic one.