“Crossing the Tiber” is an old expression describing what a Protestant does when he leaves the Reformation faith for the Roman Catholic fold. The Tiber River ran alongside old Rome; to get to Rome, one crossed it. Thus, “crossing the Tiber” refers to entering the Roman Catholic enclave. Today, descendants of our Reformed fathers gather on the banks of the Tiber River, preparing to cross. Such a strong movement toward Rome is astounding, but should not be surprising. The simple...