The reflection and experience of many years have led me to consider the holy writings not only as the most authentic and instructive in themselves, but as the clue to all other history. They tell us what man is, and they alone tell us why he is what he is: a contradictory creature that seeing and approving of what is good, pursues and performs what is evil. All of private and public life is there displayed. ... From the same pure fountain of wisdom we learn that vice destroys freedom; that arbitrary power is founded on public immorality.