"By the Church therefore in this question we under stand no other than only the visible Church. For preservation of Christianity there is not any thing more needful, than that such as are of the visible Church have mutual fellowship and society one with another. In which consideration, as the main body of the sea being one, yet within divers precincts hath divers names; so the Catholic Church is in like sort divided into a number of distinct Societies, every of which is termed a Church within itself."