I admit your tests of a Church founded by Christ, continuously existing, united, universal, and authoritative. But I cannot admit the machine made organization with its hard and fast rules, which you call the Catholic Church, to be that Church.

The Catholic Answers

If the Catholic Church is not it, no other can be it. However, the Catholic Church is not a machine-made organization. It is just as established by Christ Were the Catholic Church a man-made system, it would have gone the way of all man-made kingdoms and empires which have come and gone, whereas it has serenely kept going with a humanly inexplicable vitality.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty