For much of his life, Pascal (1623-62) worked on a magnum opus which was never published in the form the philosopher intended. Instead, Pascal left a mass of fragments, some of them meant as notes for the Apologie. These became known as the Pensees, and they occupy a crucial place in Western philosophy and religious writing. This translation is the only one based on the Pensees as Pascal left them. It includes the principal dossiers classified by Pascal, as well as the essential portion of his important Writings on Grace.