As you probably know, Catholic Bibles have 73 books, 46 in the Old Testament, and 27 in the New Testament. Protestant Bibles have 66 books with only 39 in the Old Testament. The books missing from Protestant Bibles are: Tobit, Judith, Baruch, Wisdom, Sirach, 1 and 2 Maccabees, and parts of Esther and Daniel. They are called the ‘Deuterocanonicals’ by Catholics and ‘Apocrypha’ by Protestants.
Martin Luther, without any authority whatsoever, removed those seven books and placed them in an appendix during the reformation. They remained in the appendix of Protestant Bibles until about 1826, and then they were removed altogether.
Please be mindful of the fact that those seven books had been in Bibles used by all Christians from the very foundation of Christianity. Hellenistic Greek was the language of the day during the time of Christ. This was due to the fact that Alexander the Great had conquered the region several hundred years before. The Hebrew language was on its way out, and there was a critical need for a translation of the Hebrew Old Testament for dispersed Greek speaking Jews. This translation, called the Septuagint, or LXX, was completed by Jewish scholars in about 148 B.C. and it had all of the books, including the seven removed by Martin Luther over 1650 years later.
The New Testament has about 350 references to Old Testament verses. By careful examination, scholars have determined that 300 of these are from the Septuagint and the rest are from the Hebrew Old Testament*. They have shown that Jesus Christ Himself, quoted from the Septuagint.
Early Christians used the Septuagint to support Christian teachings. For the first 300 years of Christianity, there was no Bible as we know it today. Christians had the Old Testament Septuagint, and literally hundreds of other books from which to choose.
The Catholic Church realized early on that she had to decide which of these books were inspired and which ones weren’t. The debates raged between theologians, Bishops, and Church Fathers, for several centuries as to which books were inspired and which ones weren’t. In the meantime, several Church Councils or Synods, were convened to deal with the matter, notably, Rome in 382, Hippo in 393, and Carthage in 397 and 419.
The debates sometimes became bitter on both sides. One of the most famous was between St. Jerome, who felt the seven books were not canonical, and St. Augustine who said they were.
Protestants who write about this will invariably mention St. Jerome and his opposition, and conveniently omit the support of St. Augustine. I must point out here that Church Father’s writings are not infallible statements, and their arguments are merely reflections of their own private opinions. When some say St. Jerome was against the inclusion of the seven books, they are merely showing his personal opinion of them. Everyone is entitled to his own opinion. However, A PERSONS PRIVATE OPINION DOES NOT CHANGE THE TRUTH AT ALL. There are always three sides to every story, this side, that side, and the side of truth. Whether Jerome’s position, or Augustine’s position was the correct position, had to be settled by a third party, and that third party was the Catholic Church.
Now the story had a dramatic change, as the Pope stepped in to settle the matter. In concurrence with the opinion of St. Augustine, and being prompted by the Holy Spirit, Pope St. Damasus I, at the Council of Rome in 382, issued a decree appropriately called, «The Decree of Damasus», in which he listed the canonical books of both the Old and New Testaments. He then asked St. Jerome to use this canon and to write a new Bible translation which included an Old Testament of 46 books, which were all in the Septuagint, and a New Testament of 27 books. ROME HAD SPOKEN, THE ISSUE WAS SETTLED. «THE CHURCH RECOGNIZED ITS IMAGE IN THE INSPIRED BOOKS OF THE BIBLE. THAT IS HOW IT DETERMINED THE CANON OF SCRIPTURE.