Of all the “churches” calling themselves “Christian,” can any one of them irrefutably claim to be the Church founded by Jesus Christ? Does any conform to the clear, precise terms by which this Church of Christ is described in Holy Scripture: “the house of God, which is the church of the living God, the pillar and ground of the truth” (1 Tim.3:15); or the “One Body” of which St. Paul repeatedly speaks (Rom.12:4-5; 1 Cor.10:17; 1 Cor.12:12-20; etc.); or the “Kingdom of Heaven” of the synoptic Gospels, and the “Kingdom of God” of Saint John’s? Does any one of them insist that those who fail to hear its decrees are to be treated as “the heathen and publican” (Matt.18:17)?
Yes, there is such a One True Church that meets all these descriptive requirements. The question is, which one is it?
Read more at Catholicism.org: The Church of History
Outside the Catholic Church, there are none who understand it properly. Inside the Church, there are precious few that see in it a deep and strong assertion of the truths of the Faith they profess. Still fewer are those who live the lessons disclosed in it. This article, which relies heavily on the commentaries of insightful Catholics – members of the Church Militant or Triumphant — is an attempt to bring those outside the Church in, and those inside to a fuller appreciation of how and to what depth this account is an affirmation of their Faith.