We receive them on Catholic Tradition, and therefore they are called Catholic doctrines. And that they are Catholic, is a proof that they are Apostolic; they never could have been universally received in the Church, unless they had had their origin in the origin of the Church, unless they had been made the foundation of the Church by its founders. As the separate successions of bishops in various countries have but one common origin, the Apostles, so what has been handed down through these separate successions comes from that one origin. The Apostolic College is the only point in which all the lines converge, and from which they spring. Private traditions, wandering unconnected traditions, are of no authority, but permanent, recognised, public, definite, intelligible, multiplied, concordant testimonies to one and the same doctrine, bring with them an overwhelming evidence of apostolical origin. We ground the claims of orthodoxy on no powers of reasoning, however great, on the credit of no names, however imposing, but on an external fact, on an argument the same as that by which we prove the genuineness and authority of the four gospels. The unanimous tradition of all the churches to certain articles of faith is surely an irresistible evidence, more trustworthy far than that of witnesses to certain facts in a court of law, by how much the testimony of a number is more cogent than the testimony of two or three. That this really is the ground on which the narrow line of orthodoxy was maintained in ancient times, is plain from an inspection of the writings of the very men who maintained it, Ambrose, Leo, and Gregory, or Athanasius and Hilary, and the rest, who set forth its Catholic character in more ways than it is possible here to instance or even explain. 4. However, in order to give the general reader some idea of the state of the case, I will make some copious extracts from the famous tract of Vincent of Lerins on Heresy, written in A.D. 434, immediately after the third Ecumenical Council, held against Nestorius. The author was originally a layman, and by profession a soldier. In after life he became a monk and took orders. Lerins, the site of his monastery, is one of the small islands off the south coast of France. He first states what the principle is he would maintain, and the circumstances under which he maintains it; and if his principle is reasonable and valuable in itself, so does it come to us with great weight under the circumstances which he tells us led him to his exposition of it:[367]