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'Where then is the self?' Pascal's Critique of the Ego

An apt title for a longer essay on Blaise Pascal-the French, seventeenth century scientist, mathematician, philosopher and theologist-developed along a chronological line, could be: from nothing to nothing. The first 'nothing' plays a pivotal role in one of his earliest contributions to the field of physics, and concerns the discussion about the possibility of a vacuum in nature. For more than two thousand years, first by the Aristotelian philosophy of nature, then subsequently supported by Christian theology and philosophy, the existence of nothing, a pure void within the plenitude of being was considered as an impossibility, an odd idea contradicting the widely shared conviction that nature abhors a vacuum. Of course, Pascal was not the first to perform experiments with tubes filled with mercury, water or wine to produce the remarkable creation of seemingly-as we know now thanks to those experiments, also really-empty spaces within those tubes. He may not have been the first to conduct these experiments (Torricelli and Galileo preceded him), reading the reports and discussions of the experiments, reveals Pascal's tenacity. 2 Therein he is not directly arguing in favour or against the philosophically problematic idea of empty space; relying on the impossible idea of a vacuum, he explains the phenomena observed. This eventually allows him to conclude that the lowering of liquids in a tube, turned upside down in a vessel containing the same liquid and producing the vacuum in the upper part of the tube, is entirely due to air pressure. Which is indeed, as Alexandre Koyré once put it, a remarkable way of explaining the real via the impossible 3 , that is via the counter-intuitive idea of a natural nothingness. Taking a leap from the scientific observations and calculations stemming from the early stages of Pascal's adult life, to the months preceding his premature death in 1662 at the 1 Blaise Pascal, Pensées, trans. A.J. Krailsheimer, London: Penguin 1966, 240. This English translation relies on Louis Lafuma's edition of the Pensées. Following a common practice in referring to Pensées, the number of the pensée will be added, according to the Lafuma, Léon Brunschvicg and Philippe Sellier editions, respectively. The motto above is taken from: Laf. 656 / Br. 368 / Sel. 743. 2 See Dominique Descotes, 'Pascal. Le calcul et la théologie', in: Pour la science, 16 (2003), 1-93. 3 Alexandre Koyré, Etudes d'histoire de la pensée scientifique. Paris: Gallimard, 1966, 185-186.