Nephi again requires of them assent to the basic premise of his argument, that their might be a situation in which children of Israel might be in bondage, that they could only be led from bondage by a prophet, and that it is a good thing that it happened. This is setting up their own departure, which is being paralleled to the departure of Israel from Egypt. The bondage of the children of Israel will be correlated with the bondage their family would have been in had they remained in Jerusalem.