This is the doctrine that separates the movement from every other body that calls itself Christian, and members know it. The Divine Principle holds that Jesus came to marry, to found a lineage without original sin, and to establish the kingdom in his own lifetime; that John the Baptist failed to prepare the way; and that the crucifixion was therefore a substitute course, achieving spiritual salvation but not physical. It follows that the work is unfinished and that someone must finish it. Every Christian body that has examined the claim has rejected it, and the movement is used to being told so. Members generally answer that they read the same Bible and reach a different conclusion about what the rejection of Jesus cost.