Pascal's Birthday (and a Summer Series on his Work)

Today is the anniversary of the birthday of the formidable mathematician and thoroughly unsystematic philosopher, Blaise Pascal. For a collection of posts for fun on his work (which I'll try to continue throughout the summer, and which was inspired by Michael's wonderful post on Jansenism's "long tail"), see this, this ("On Legitimacy"), this ("On Intention"), and this ("The Wager").