The idea of the sacred is quite simply one of the most conservative notions in any culture, because it seeks to turn other ideas - uncertainty, progress, change - into crimes.
The acceptance that all that is solid has melted into the air, that reality and morality are not givens but imperfect human constructs, is the point from which fiction begins.
Throughout human history, the apostles of purity, those who have claimed to possess a total explanation, have wrought havoc among mere mixed-up human beings.