The unique interest of these monuments lies in the fact that they are the incorruptible record of the sentiments, affections, and beliefs of the first Christians. In these frescoes and inscriptions no forgeries or interpolations could creep, no P1 and P2, no "Elohist" or "Jahvist" could confuse the issues and mystify the interpretation. The untouched story appeals to us in mute eloquence. To what side does the testimony of the Roman catacombs lean? The critical method in history has destroyed the foundations of historical Protestantism: has it laid bare the foundations of historical Catholicism? The people who frequented the catacombs did not feel or think or believe like the men who reformed Christianity in the sixteenth century, but it is as true to say that they did not think or believe like the men of the Catholic reaction. The catacombs record a period when Christian life and Christian discipline still seemed more important than Christian dogma, when this last was not yet fixed, when it was still true that "what can be prayed is the rule of what may be believed"--_lex orandi lex credendi_; and here in the place of the dead "what could be prayed" became a veritable norm of what Christians were to formulate as precious dogma later. In the first place then, the frescoes and inscriptions frequently bring before us the notions of rebirth by baptism, and of eternal life by participation in Christ through the mystical commerce of the Eucharist--the Johannine conception; new birth and new life are the keynote ideas in this place of the dead. Sacraments, conceived as material channels conveying grace, already form an integral part of the Christian consciousness; but the assumption that "the seven sacraments" are to be found in the catacombs shows as little knowledge of the history of the Church for the first twelve centuries as of the habits of belief of the Christians of the first, second, and third. If there had ever been an age of the Church before controversy, we might say that the catacombs recorded it. But there never was such an age: what can be found here, however, are the spontaneous Judaic-Gentile beliefs of Christians who learnt their faith through terrible and comforting experiences almost as much as through the first apostolic preaching or the later ministrations of those visitors between Church and Church called in the New Testament "apostles and prophets." The religion of the catacombs was partly formed in the living; it is the faith, formulated, gauged, and tested by the faithful. Hence there is not only spontaneousness, but boldness, liberty of spirit, the absence of all fear of being misunderstood, misconstrued. They did not think as we do, and centuries were to elapse before the minimisers or the maximisers would torture what they said and did with meanings they would not bear.