Hersesy is denying the word of God, and the word of God is much more reliably expressed in the natural world as it’s revealed through reason and science than in what I have heard described wonderfully as “the giant book of Jewish fairy stories".

Reason shapes the future, but superstition infects the present.

I think the easiest people to fool are ourselves. Fooling ourselves may even be a necessary precondition for fooling others.

Science fiction has its own history, its own legacy of what's been done, what's been superseded, what's so much part of the furniture it's practically part of the fabric now, what's become no more than a joke... and so on. It's just plain foolish, as well as comically arrogant, to ignore all this, to fail to do the most basic research.

...[Changers] were a threat to identity, a challenge to the individualism even of those they were never likely to impersonate. It had nothing to do with souls or physical or spiritual possession; it was, as the Idirans well understood, the behavouristic copying of another which revolted. Individuality, the thing which most humans held more precious than anything else about themselves, was somehow cheapened by the ease with which a Changer could ignore it as a limitation and use it as a disguise.

I think a lot of people are frightened of technology and frightened of change, and the way to deal with something you're frightened of is to make fun of it. That's why science fiction fans are dismissed as geeks and nerds.

Oh, they never lie. They dissemble, evade, prevaricate, confound, confuse, distract, obscure, subtly misrepresent and willfully misunderstand with what often appears to be a positively gleeful relish and are generally perfectly capable of contriving to give one an utterly unambiguous impression of their future course of action while in fact intending to do exactly the opposite, but they never lie. Perish the thought.