Originally published in 1728 at the beginning of the Enlightenment when rational criticism of religious belief was at its peak, William Law's work succeeded in inspiring the most cynical men of the age with its arguments in favor of a spiritual life. Proclaiming that God does not merely forgive our disobedience, but directly calls us to obedience and to a life completely centered in him, Law declares, "If you will here stop and ask yourself why you...