That was a distance of fifteen hundred miles. But this astonishing claim does not mean he had spoken about Christ to every single person in that vast area. What he had done was plant churches in the main centers of Cyprus and Crete, all across present day Turkey, Greece, and up into present day Croatia. When he wrote to the Church in Rome, he looked forward to doing the same in Spain. Again the image of kingship helps us learn the language we need to understand the ordinary day to day work of Christians under their King.
Earthly kings reign in a kingdom.
They have a royal family, subjects and enemies. They are served by soldiers, servants and priests. All the cultures from which we have written documents in the ancient world had priests to teach and make visible in worship what they thought God had in mind for them. In some cases the king functioned as the high priest of his royal priesthood. They were meant to be a priestly nation to serve all other nations.