There is nothing that overwhelms the senses quite like an unwelcome silence.

Don't assume that a species is intelligent because it produces intelligent individuals.

People who wear their religion on their sleeves talk a lot about going to Sunday school, reading the Bible, and doing good works. And I suppose there's no harm in that. But if I'd gone to the trouble to pull all this together ... and people never paid any attention to it, never bothered to try to find out how the world worked, then I think I'd get annoyed.

The queen of virtues is the recognition of one's own flaws.

Life is a walk in the fog. Most people don't know that. They're fooled by the sunlight into thinking they can see what's ahead. But it's the reason they are forever getting lost or falling into ditches or committing matrimony.

What would happen is that people like Geroge and Alyx would grow old and die chasing a dream. Although there were probably worse things to do with one's life.

Throughout our long and sorry history it has been men who supposed themselves to be exemplars of integrity who have done all the damage. Every crusade, whether for decent literary standards or to cover women's bodies or to free the holy land, had been launched, endorsed, and enthusiastically perpetrated by men of character.