Foucault's Pendulum (original title: Il pendolo di Foucault) is a 1988 novel by Italian novelist and philosopher Umberto Eco. Its theme is the popularity of conspiracy theories throughout time.
- When the Light of the Endless was drawn in the form of a straight line in the Void... it was not drawn and extended immediately downwards, indeed it extended slowly — that is to say, at first the Line of Light began to extend and at the very start of its extension in the secret of the Line it was drawn and shaped into a wheel, perfectly circular all around. - beginning quotation (original in Hebrew)
- "Ma gavte la nata." - Jacopo Belbo
- "There are four kinds of people in this world: cretins, fools, morons, and lunatics." - Jacopo Belbo
- "The lunatic is all idée fixe, and whatever he comes across confirms his lunacy. You can tell him by the liberties he takes with common sense, by his flashes of inspiration, and by the fact that sooner or later he brings up the Templars." - Jacopo Belbo
