There are few things more dangerous than a zealot with discipline

Zealots: Wild eyed persons afflicted with incurable certainty about the workings of the world, a certainty that can lead to violence when the world doesn't fit.

Zealots are rarely ever weakened by disbelievers; in fact, they are encouraged by them.

Misuse of reason might yet return the world to pre-technological night; plenty of religious zealots hunger for just such a result, and are happy to use the latest technology to effect it.

There are some upon this earth of yours who lay claim to know us, and who do their deeds of passion, pride, ill-will, hatred, envy, bigotry, and selfishness in our name; who are as strange to us and all our kith and kin, as if they had never lived. Remember that, and charge their doings on themselves, not us.

If the world is full of monsters, someone has to be keeping us safe. Someone has to be fighting for us out there.