This is from some commission work. I may not have time for a good, full article, but I thought this would be quick and helpful for anyone.
Saint Irenaeus was a Church Father. This means that he lived before the eighth century after Christ, was a bishop (A bishop is the head of a diocese and a direct successor of the Apostles, as opposed to priests and deacons. Some later Fathers were not bishops.), and that he was significant in defending doctrine especially by his writings. Saint Irenaeus was a disciple of Saint Polycarp, who was martyred by fire and glowed like gold while he was being burnt. Polycarp in turn was a disciple of Saint John the Beloved Disciple while the latter was a bishop in Ephesus. Irenaeus was the Bishop of Lyons in modern-day France, and he wrote the book Against Heresies in which he says: “Holding, therefore, this rule, we shall easily show, notwithstanding the great variety and multitude of their opinions, that these men have deviated from the truth; for almost all the different sects of heretics admit that there is one God; but then, by their pernicious doctrines, they change [this truth into error], even as the Gentiles do through idolatry— thus proving themselves ungrateful to Him that created them. Moreover, they despise the workmanship of God, speaking against their own salvation, becoming their own bitterest accusers, and being false witnesses. Yet, reluctant as they may be, these men shall one day rise again in the flesh, to confess the power of Him who raises them from the dead; but they shall not be numbered among the righteous on account of their unbelief.” Elsewhere in the same work he says: “the Catholic Church possesses one and the same faith throughout the whole world, as we have already said.”; and also: “But, again, when we refer them to that tradition which originates from the apostles, which is preserved by means of the succession of presbyters [in English, priests,] in the churches, they object to tradition, saying that they themselves are wiser not merely than the presbyters, but even than the apostles, because they have discovered the unadulterated truth.”
Here is a longer excerpt from the same Father which describes clearly how the Catholic Church based in Rome can be discerned by anyone as the True Church:
“It is within the power of all, therefore, in every church, who may wish to see the truth, to contemplate clearly the tradition of the apostles manifested throughout the whole world; and we are in a position to reckon up those who were by the apostles instituted bishops in the churches, and the succession of these men to our own times; those who neither taught nor knew of anything like what these [heretics] rave about. For if the apostles had known hidden mysteries, which they were in the habit of imparting to ‘the perfect’ apart and privily from the rest, they would have delivered them especially to those to whom they were also committing the churches themselves. For they were desirous that these men should be very perfect and blameless in all things, whom also they were leaving behind as their successors, delivering up their own place of government to these men; which men, if they discharged their functions honestly, would be a great boon, but if they should fall away, the direst calamity.
“Since, however, it would be very tedious, in such a volume as this, to reckon up the successions of all the churches, we do put to confusion all those who, in whatever manner, whether by an evil self-pleasing, by vainglory, or by blindness and perverse opinion, assemble in unauthorized meetings; [we do this, I say,] by indicating that tradition derived from the apostles, of the very great, the very ancient, and universally known church founded and organized at Rome by the two most glorious apostles, Peter and Paul; as also [by pointing out] the faith preached to men, which comes down to our time by means of the successions of the bishops. For it is a matter of necessity that every church should agree with this church, on account of its preeminent authority.
“The blessed apostles, then, having founded and built up the church, committed into the hands of Linus the office of the episcopate [bishopric]. Of this Linus, Paul makes mention in the Epistles to Timothy. To him succeeded Anacletus; and after him, in the third place from the apostles, Clement was allotted the bishopric. This man, as he had seen the blessed apostles, and had been conversant with them, might be said to have the preaching of the apostles still echoing, and their traditions before his eyes. Nor was he alone, for there were many still remaining who had received instructions from the apostles. In the time of this Clement, no small dissension having occurred among the brethren at Corinth, the church in Rome dispatched a most powerful letter to the Corinthians, exhorting them to peace, renewing their faith, and declaring the tradition which it had lately received from the apostles, proclaiming the one God, omnipotent, the Maker of heaven and earth, the Creator of man, who brought on the deluge, and called Abraham, who led the people from the land of Egypt, spoke with Moses, set forth the law, sent the prophets, and who has prepared fire for the devil and his angels. From this document, whosoever chooses to do so, may learn that He, the Father of our Lord Jesus Christ, was preached by the churches, and may also understand the apostolic tradition of the Church, since this Epistle is of older date than these men who are now propagating falsehood, and who conjure into existence another god beyond the Creator and the Maker of all existing things. To this Clement there succeeded Evaristus. Alexander followed Evaristus; then, sixth from the apostles, Sixtus was appointed; after him, Telephorus, who was gloriously martyred; then Hyginus; after him Pius; then after him, Anicetus. Soter having succeeded Anicetus, Eleutherius does now, in the twelfth place from the apostles, hold the inheritance of the episcopate. In this order, and by this succession, the ecclesiastical tradition from the apostles, and the preaching of the truth, have come down to us. And this is most abundant proof that there is one and the same vivifying faith, which has been preserved in the Church from the apostles until now, and handed down in truth.
“But Polycarp also was not only instructed by apostles, and conversed with many who had seen Christ, but was also, by apostles in Asia, appointed bishop of the Church in Smyrna, whom I also saw in my early youth, for he tarried a very long time, and, when a very old man, gloriously and most nobly suffering martyrdom, departed this life, having always taught the things which he had learned from the apostles, and which the Church has handed down, and which alone are true. To these things all the Asiatic Churches testify, as do also those men who have succeeded Polycarp down to the present time— a man who was of much greater weight, and a more steadfast witness of truth, than Valentinus, and Marcion, and the rest of the heretics. He it was who, coming to Rome in the time of Anicetus caused many to turn away from the aforesaid heretics to the Church of God, proclaiming that he had received this one and sole truth from the apostles— that, namely, which is handed down by the Church. There are also those who heard from him that John, the disciple of the Lord, going to bathe at Ephesus, and perceiving Cerinthus within, rushed out of the bath-house without bathing, exclaiming, ‘Let us fly, lest even the bath-house fall down, because Cerinthus, the enemy of the truth, is within.” And Polycarp himself replied to Marcion, who met him on one occasion, and said, ‘Do you know me?’ ‘I do know you, the first-born of Satan.’ Such was the horror which the apostles and their disciples had against holding even verbal communication with any corrupters of the truth; as Paul also says, ‘A man that is an heretic, after the first and second admonition, reject; knowing that he that is such is subverted, and sins, being condemned of himself.’ There is also a very powerful Epistle of Polycarp written to the Philippians, from which those who choose to do so, and are anxious about their salvation, can learn the character of his faith, and the preaching of the truth. Then, again, the Church in Ephesus, founded by Paul, and having John remaining among them permanently until the times of Trajan, is a true witness of the tradition of the apostles.”
Saint Ignatius of Antioch
Saint Ignatius was another Church Father, a friend of Saint Polycarp, and a disciple directly to Saint John. That is, he learned everything about the faith from the same Apostle who reclined on the Heart of Jesus at the Last Supper, was a witness to His bloody sweat in the garden, stood by His feet at the Cross even after James had fled and Peter had apostasized, took the Virgin Mary into his own home, and was a bishop of Ephesus after receiving the Holy Ghost at Pentecost. Polycarp was his disciple in Ephesus and so was Ignatius. Ignatius was the Bishop of Antioch after Saint Peter established that church prior to establishing the church at Rome and being martyred there. He was sentenced to die at Rome and in his travels wrote to that church with marks of respect:
“Ignatius, also called Theophorus, to the Church that has found mercy in the greatness of the Most High Father and in Jesus Christ, his only son; to the Church beloved and enlightened after the love of Jesus Christ, our God, by the will of him that has willed everything which is; to the Church which also holds the presidency in the place of the country of the Romans, worthy of God, worthy of honor, worthy of blessing, worthy of praise, worthy of success, worthy of sanctification, and because you hold the presidency of love, named after Christ and named after the Father; here therefore do I salute in the name of Jesus Christ, the Son of the Father.”; and later on, “You have envied no one; but others you have taught. I desire only that what you have enjoined in your instruction may remain in force.”
He also wrote to Saint Polycarp, and it is here we read how he describes the authority of the Catholic Church, exactly as it exists today, emanating from Rome and nowhere else: “Give heed to the bishop, that God also may give heed to you. My soul be for theirs that are submissive to the bishop, to the presbyters, and to the deacons, and may my portion be along with them in God! Labor together with one another; strive in company together; run together; suffer together; sleep together; and awake together, as the stewards, and associates, and servants of God. Please Him under whom you fight and from whom you receive your wages. Let none of you be found a deserter. Let your baptism endure as your arms; your faith as your helmet; your love as your spear; your patience as a complete panoply. Let your works be the charge assigned to you, that you may receive a worthy recompense. Be long-suffering, therefore, with one another, in meekness, as God is towards you. May I have joy of you forever.”
Many Protestants do not know from where the Bible comes, which they consider the only unitive authority of the general and fragmented Christian religion. For more information on this, visit our page on Holy Scriptures and the error of Sola Scriptura. However, suffice it to say that a single man is responsible more than any other for compiling the Bible which has been handed down to every Protestant affiliation in existence (although it has been severely edited by Luther and others after him). This man during the time of Constantine the Great compiled and translated the Bible which was later declared infallible by the Catholic Church. Until this time, there was only Sacred Tradition, which comprised certain writings of the Apostles, the Evangelists, and others in addition to the Old Testament which varied greatly in translations. He writes to the Pope of his time, Damasus:
“Since the East, shattered as it is by the long-standing feuds, subsisting between its peoples, is bit by bit tearing into shreds the seamless vest of the Lord, woven from the top throughout, since the foxes are destroying the vineyard of Christ, and since among the broken cisterns that hold no water it is hard to discover the sealed fountain and the garden enclosed, I think it my duty to consult the chair of Peter, and to turn to a church whose faith has been praised by Paul. I appeal for spiritual food to the church whence I have received the garb of Christ. The wide space of sea and land that lies between us cannot deter me from searching for the pearl of great price. Wheresoever the body is, there will the eagles be gathered together. Evil children have squandered their patrimony; you alone keep your heritage intact. The fruitful soil of Rome, when it receives the pure seed of the Lord, bears fruit an hundredfold; but here the seed grain is choked in the furrows and nothing grows but darnel or oats. In the West the Sun of righteousness is even now rising; in the East, Lucifer, who fell from heaven, has once more set his throne above the stars. You are the light of the world, you are the salt of the earth, you are vessels of gold and of silver. Here are vessels of wood or of earth, which wait for the rod of iron, and eternal fire.
“Yet, though your greatness terrifies me, your kindness attracts me. From the priest I demand the safe-keeping of the victim, from the shepherd the protection due to the sheep. Away with all that is overweening; let the state of Roman majesty withdraw. My words are spoken to the successor of the fisherman, to the disciple of the cross. As I follow no leader save Christ, so I communicate with none but your blessedness, that is with the chair of Peter. For this, I know, is the rock on which the church is built! This is the house where alone the paschal lamb can be rightly eaten. This is the Ark of Noah, and he who is not found in it shall perish when the flood prevails. But since by reason of my sins I have betaken myself to this desert which lies between Syria and the uncivilized waste, I cannot, owing to the great distance between us, always ask of your sanctity the holy thing of the Lord. Consequently I here follow the Egyptian confessors who share your faith, and anchor my frail craft under the shadow of their great argosies. I know nothing of Vitalis; I reject Meletius; I have nothing to do with Paulinus. He that gathers not with you scatters; he that is not of Christ is of Antichrist.”