This work is designed to show that there is an implicit connection between Ockham's academic and political careers in his theory of conscience. ;Thomas Aquinas offers a theory of moral responsibility according to which the conscientious individual has knowledge of the rightness of her act which does not preclude her doing otherwise. His account of the will, however, proves that this state of affairs never obtains. Ockham's alternative presupposes that we freely choose our own ends. He is therefore entitled to (...) assert that conscience is the knowledge of one's own acts as right or wrong. ;The libertarian metaphysics underlying Ockham's ethics is tested by the problem of unfulfilled prophecy. Thomas Bradwardine argues that the Antichrist is free not to come because it is possible for God to undo the past. Thomas Buckingham argues for the possibility that the prophecy never meant that the Antichrist was going to come. Meanwhile, Ockham is left with the possibility that God lied. Ockhamist John of Mirecourt shows why this 'heretical' solution is the only way to save the faith. Ockham's theory of conscience provides a sound basis for interpreting his treatise on heresy. Heresy is disobedience, not to authority, but to the truth. Since the condemnation of heresy is itself a paradigm instance of this kind of perversity, freedom of speech prevails by default. Ockham's conception of a community united by this realization provides an answer to twentieth-century speech-regulation advocates. ;Ockham thought that it is through our obedience to the truth that Jesus's promise to be with his disciples 'always, to the end of the age' will be fulfilled. According to Walter Burley, 'I promise you a Christian' converts with 'A Christian is promised to you by me.' According to Ockham, in contrast, it is an opaque construction. This account of the logic of indefinite promises implies that no individual can claim to be one of the disciples to whom Jesus was referring. ;I hope to leave the reader in a better position to appreciate the sense in which the claim that Ockham's two careers are united by his nominalism may be considered correct. (shrink)