“Vatican I, for example, affirms that the Church herself, by reason of her marvelous extension, her eminent holiness, and her inexhaustible fruitfulness in every good thing, as well as by her Catholic unity and invincible stability, is a great and perpetual motive of belief and an irrefutable witness to her own divine mission. In a word, the Catholic Church has been endowed with all the mark necessary to allow any man of good faith to adhere to her as the true Church.” CatholicCatholicismCatholic ChurchCatholic Tradition Book:One Hundred Years of Modernism: A Genealogy of the Principles of the Second Vatican Council Source: One Hundred Years of Modernism: A Genealogy of the Principles of the Second Vatican Council