Note (return) — Chapter II

But, in consequence of the naturalising of Christianity in the world and the repelling of heresy, a formulated creed was made the basis of the Church. This confession was also recognised as a foundation of her unity and guarantee of her truth, and in certain respects as the main one. Christendom protected itself by this conception, though no doubt at a heavy price. To Irenæus and Tertullian the Church rests entirely on the apostolic, traditional faith which legitimises her.145 But this faith itself appeared as a law and aggregate of doctrines, all of which are of equally fundamental importance, so that their practical aim became uncertain and threatened to vanish ("fides in regula posita est, habet legem et salutem de observatione legis").