At the heart of Martin Luther's theology was the conviction that human beings are totally dependent on God's omnipotent grace to rescue us from the bondage of the will by creating and decisively fulfilling every inclination to believe and obey God. The debates of the sixteenth century about the freedom of the will versus the bondage of the will were not peripheral to the Reformation. They were at the heart of the issue. At least Luther believed they were. His book The Bondage of the Will was an answer to Erasmus's book The Freedom of the Will.