II. The Relationship Between Tradition and Sacred Scripture

One common source...

80 "Sacred Tradition and Sacred Scripture, then, are bound closely together and communicate one with the other. For both of them, flowing out from the same divine well-spring, come together in some fashion to form one thing and move towards the same goal. Each of them makes present and fruitful in the Church the mystery of Christ, who promised to remain with his own "always, to the close of the age."

...two distinct modes of transmission

81 "Sacred Scripture is the speech of God as it is put down in writing under the breath of the Holy Spirit.

"And [Holy] Tradition transmits in its entirety the Word of God which has been entrusted to the apostles by Christ the Lord and the Holy Spirit. It transmits it to the successors of the apostles so that, enlightened by the Spirit of truth, they may faithfully preserve, expound, and spread it abroad by their preaching.

82 As a result the Church, to whom the transmission and interpretation of Revelation is entrusted, "does not derive her certainty about all revealed truths from holy Scriptures alone. Both Scripture and Tradition must be accepted and honored with equal sentiments of devotion and reverence." Catechism of the Catholic Church, page 31, Doubleday, New York, 1995.

138 The Church accepts and vererates as inspired the 46 books of the Old Testament and the 27 books of the New. Catechism of the Catholic Church, page 44, Doubleday, New York, 1995. Note: Protestants do not accept certain books called the Apocrapha to be inspired.