One of the doctrines in the area of Christology that is difficult for some Christians to fully grasp is the permanent humanity of Christ. The impression often seems to be that the Son of God came down from heaven in incarnate form, spent three decades or so as a human, and then returned to heaven to revert back to his preincarnate state. But this is Christological error, if not outright heresy. The Son of God clothed himself with humanity and will never unclothe himself.