As a matter of fact the marks on which Catholic theologians laid stress, viz. the Church’s “oneness, holiness, Catholicity” and apostolicity furnished a striking answer to the question: Where is the Church? She is Apostolic because her connection with the Apostles has never been broken; Catholic because of her universal existence throughout the world; holy in her aims and means and in the practice of Christian virtue by the generality of her followers, and also on account of the special gifts of grace which have ever brightened her path through the ages; lastly, she is one, outwardly in being alone, and also inwardly, in the unity of her faith and belief, liturgy and sacraments, and in her character as a society in which a divinely appointed spiritual authority rules which the rest obey. In the latter respect the Church, to the Catholic mind, is even a “_societas perfecta_,” visible, moreover, to the whole world like the “city set on a hill” (Matt. v. 12) in which the Fathers of the Church indeed always saw an image of the Church;[1105] she is as a building built upon a rock, as a flock gathered round the shepherd, both of them comparisons which we owe to the Church’s Divine Founder. It was not without reason that Luther was averse to any appeal to the four marks of the Church just referred to. What unity had he wherewith to confront that of Catholicism under its Pope? Apostolicity, as an historical union with Christ’s Apostles was so evidently wanting in his case that he declared that the doctrine he had come to preach had died out shortly after Apostolic times. Any claim to Catholicity in the usual sense of the word was not to be thought of for a moment. The only olden marks which he does not throw over is that of holiness. He here relies on the existence of holiness in the case of a few as being sufficient for his purpose. Nevertheless, due justice must be done to the stress he is ever disposed to lay on the holiness of the Church. He practically makes all the other marks to centre in this, for he speaks of the seven marks mentioned above as the sevenfold “sanctuary whereby the Holy Ghost sanctifies Christ’s holy nation.”[1106] “Even though it was impossible for him,” remarks Johann Adam Möhler, “to teach that the Church was to be regarded as a living institution in which men become holy, yet he sticks fast to the idea that she ought by rights to be composed of saints.… The inner Church [called by theologians the “soul” to distinguish it from the outward “body” of the Church] is everywhere in evidence, and the fact that no one is a true citizen of the heavenly kingdom if he belongs only outwardly to the Church and has not entered into the spirit of Christ and felt within himself its vivifying power, is pointed out [by Luther] in a way which merits all praise.”[1107]