In the Firmiter, the first chapter of the doctrinal declarations of the Fourth Lateran Council, we find the following declaration: "There is, then, one universal Church of the faithful (una . . . fidelium universalis ecclesia), outside of which no one at all is saved (extra quam nullus omnino salvatur)." [Denz., 430.]
This formula bears a singular resemblance to one contained in the profession of faith prescribed by Pope Innocent III in 1208 for the Waldensians who wished to return to the Catholic Church: "We believe in our hearts and we profess orally that there is one Church, not that of the heretics, but the Holy Roman Catholic and Apostolic [Church], outside of which we believe that no one will be saved." [Denz., 423.]