"During the years that followed the writing of the and lesser religious works Pascal began to devote his life to the advancement of Christianity. At the the heart of this activity were the Thoughts, which, begun around September 1656, date mainly from 1657 and 1658. ... This is a largely unfinished work, and (in the view of many commentators) is the most ambitious of all attempts to convert the agnostic and the atheist to religious belief."