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The more intelligent one is, the more men of originality one finds. Ordinary people find no difference between men.
Blaise Pascal

The French thinker, mathematician, and scientist Blaise Pascal, b. June 19, 1623, d. Aug. 19, 1662, has been credited not only with imaginative and subtle work in geometry and other branches of mathematics, but with profoundly influencing later generations of theologians and philosophers. A prodigy in mathematics, Pascal had mastered Euclid's Elements by the age of 12. Pascal invented and sold the first calculating machine (1645). His study of hydrostatics led to his invention of the syringe and hydraulic press. In 1647, a few years after publishing Essay pour les coniques (Essay on Conic Sections), based on the methods of Gerard Desargues, he suddenly abandoned the study of mathematics. Because of his chronically poor health, he had been advised to seek diversions from study and attempted for a time to live in Paris in a deliberately frivolous manner. His later interest in probability theory has been attributed to his interest in calculating the odds involved in the various gambling games he played during this period.

At the end of 1654, after several months of intense depression, Pascal had a religious experience that altered his life. He entered the Jansenist monastery at Port-Royal, although he did not take orders. He never published in his own name again. The Jansenists encouraged him in his mathematical studies, which he resumed. To assist them in their struggles against the Jesuits, he wrote, under a pseudonym, a defense of the famous Jansenist Antoine Arnauld, in the form of 18 epistles. Known as Lettres provinciales, they were likely responsible for the subsequent reputation of the Jesuits as hypocritical and casuistic. In 1658 he broke with the Jansenists and left the monastery. He continued mathematical study and worked on calculus and on probability theory with Pierre de Fermat.

Pascal died at the age of 39 in intense pain after a malignant growth in his stomach spread to the brain. His most famous work is the Pensees (Thoughts), a set of deeply personal meditations in somewhat fragmented form on human suffering and faith in God. "Pascal's wager" expresses the conviction that belief in God is rational: if God does not exist, one stands to lose nothing by believing in him anyway, while if he does exist, one stands to lose everything by not believing.

--Catherine Wilson--

"Man is obviously made for thinking. Therein lies all his dignity
and his merit; and his whole duty is to think as he ought."
The Provincial Letters
La Machine d'Arithmétique

More Information
imageeBlaise Pascal
imageeA Short Account of the History of Mathematics
imageeBlaise Pascal (Norway)
imageePascal Lecture Hall
imageePascal Live Recitation

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