 These First Meditation remarks set the stage for the discussion that comes in the Fourth Meditation. Descartes needs a theodicy for error – theodicy being an effort to explain how God is compatible with evil. The theodicy needs to show that the existence of an all-perfect God is compatible with some forms of judgment error, but not others; somehow, God allows error in our sensory judgments, while guaranteeing the inerrancy of judgments based on clear and distinct perception. In contrast with the First Meditation setting, the context of the Fourth Meditation comes on the heels of a demonstration of the existence of an all-perfect God. The argument of the Fourth Meditation thus begins by reviewing the problem where the First Meditation left it, but in the light of the meditator’s newfound conclusion – “to begin with, I recognize that it is impossible that God should ever deceive me.” The passage continues: