“Fanaticism is to superstition what delirium is to fever, what rage is to anger.”Voltaire · Dicționar filozofic · 1764 · Fanatisme
Fanaticism is not a different belief, but superstition gone delirious.
Voltaire distinguishes between a common state and its paroxysm. Superstition is an irrational but passive belief, present in many people without grave effects; fanaticism is the moment that same belief boils over into violent action. The medical analogies show the relation: fever can exist without delirium, but delirium presupposes fever. A superstitious village usually stays peaceful; the same village in a fanatic crisis burns the witch.
Voltaire leaves us a question the card does not touch: who raises the temperature? A village's superstition does not turn into delirium on its own. It needs someone to heat it, step by step, with words and fear. The medical analogy hides an agent: fever has a cause, and delirium a trigger. Think of an online group that believes an absurd theory. For months it laughs about it, peacefully. Then someone tells them the enemies are among them, that it is time to act. Same belief, but now boiling. So the useful question is not only how irrational a belief is, but who profits when it ignites. And what does an ordinary person do when they hear a finger pointing at the neighbour?
Why it matters It lets you spot the warning sign: where collective superstition grows, violence may become only a matter of temperature.