He wrote a preface to a math textbook known as "Of the Geometrical Spirit," and his "On the Art of Persuasion" examined geometry's axiomatic method.  
He wrote a preface to a math textbook known as "Of the Geometrical Spirit," and his "On the Art of Persuasion" examined geometry's axiomatic method.  Under the pseudonym Louis de Montalte, this man wrote series of letters in defense of Jansenism, published as "The Provincial Letters." One work by this man includes chapters on "Proofs of Moses," "Boredom," and a section arguing that belief in a deity boils down to a utilitarian choiceÂ—his namesake wager. FTP, who is this seventeenth century French mathematician and philosopher who wrote PensÃ©es or "thoughts"?
He wrote a preface to a math textbook known as "Of the Geometrical Spirit," and his "On the Art of Persuasion" examined geometry's axiomatic method.  
Blaise Pascal