"L'homme est un roseau pensant": cette célèbre pensée ne constitue qu'un des quelque huit cents fragments que comptent les Pensées, qui composent l'un des textes fondateurs de la pensée moderne. Destinées à l'origine à convaincre les libertins de la nécessité de croire en Dieu, ces pensées, telles que nous les lisons, forment un texte qui dépasse largement la simple apologie de la religion chrétienne et qui s'adresse à un public très large, puisque son principal sujet, c'est l'Homme. En voulant apporter la preuve mathématique de l'existence de Dieu (c'est l'argument bien connu du "pari"), Pascal nous livre avant tout une exemplaire peinture de l'Homme, miné par sa misère, mais sauvé par sa grandeur. Maximes à méditer au hasard ou essai sur l'Homme à dévorer d'une traite, chacun trouvera dans ce texte une lecture qui lui correspond. Dans cette édition, l'ordre choisi par Michel Le Guern pour organiser les fragments du manuscrit redonne toute sa puissance au discours pascalien tout en nous offrant une vision claire, efficace et pertinente du texte.
Early work of Blaise Pascal of France included the invention of the adding machine and syringe and the co-development with Pierre de Fermat of the mathematical theory of probability; later, he, a Jansenist, wrote on philosophy and theology, notably as collected in the posthumous Pensées (1670).
This contemporary of René Descartes attained ten years of age in 1633, when people forced Galileo Galilei to recant his belief that Earth circled the Sun. He lived in Paris at the same time, when Thomas Hobbes in 1640 published his famous Leviathan (1651). Together, Pascal created the calculus.
A near-fatal carriage accident in November 1654 persuaded him to turn his intellect finally toward religion. The story goes that on the proverbial dark and stormy night, while Pascal rode in a carriage across a bridge in a suburb of Paris, a fright caused the horses to bolt, sending them over the edge. The carriage, bearing Pascal, survived. Pascal took the incident as a sign and devoted. At this time, he began a series, called the Provincial Letters, against the Jesuits in 1657.
Pascal perhaps most famously wagered not as clearly in his language as this summary: "If Jesus does not exist, the non Christian loses little by believing in him and gains little by not believing. If Jesus does exist, the non Christian gains eternal life by believing and loses an infinite good by not believing.”
Sick throughout life, Pascal died in Paris from a combination of tuberculosis and stomach cancer at 39 years of age. At the last, he confessed Catholicism.