The Vatican Council
Third Session, Chapter 2 
ON REVELATION
The same holy mother church holds and teaches that God, the source and end of all things, can be known with certainty from the consideration of created things, by the natural power of human reason : ever since the creation of the world, his invisible nature has been clearly perceived in the things that have been made. [13]
It was, however, pleasing to his wisdom and goodness to reveal himself and the eternal laws of his will to the human race by another, and that a supernatural, way. This is how the Apostle puts it : In many and various ways God spoke of old to our fathers by the prophets; but in these last days he has spoken to us by a Son [14]. It is indeed thanks to this divine revelation, that those matters concerning God which are not of themselves beyond the scope of human reason, can, even in the present state of the human race, be known by everyone without difficulty, with firm certitude and with no intermingling of error. It is not because of this that one must hold revelation to be absolutely necessary; the reason is that God directed human beings to a supernatural end, that is a sharing in the good things of God that utterly surpasses the understanding of the human mind; indeed eye has not seen, neither has ear heard, nor has it come into our hearts to conceive what things God has prepared for those who love him [15] .
Now this supernatural revelation, according to the belief of the universal church, as declared by the sacred council of Trent, is contained in written books and unwritten traditions, which were received by the apostles from the lips of Christ himself, or came to the apostles by the dictation of the Holy Spirit, and were passed on as it were from hand to hand until they reached us [16]. The complete books of the old and the new Testament with all their parts, as they are listed in the decree of the said council and as they are found in the old Latin Vulgate edition, are to be received as sacred and canonical.
These books the church holds to be sacred and canonical not because she subsequently approved them by her authority after they had been composed by unaided human skill, nor simply because they contain revelation without error, but because, being written under the inspiration of the Holy Spirit, they have God as their author, and were as such committed to the church. Now since the decree on the interpretation of holy scripture, profitably made by the council of Trent, with the intention of constraining rash speculation, has been wrongly interpreted by some, we renew that decree and declare its meaning to be as follows: that in matters of faith and morals, belonging as they do to the establishing of christian doctrine, that meaning of holy scripture must be held to be the true one, which holy mother church held and holds, since it is her right to judge of the true meaning and interpretation of holy scripture.
In consequence, it is not permissible for anyone to interpret holy scripture in a sense contrary to this, or indeed against the unanimous consent of the fathers.
13. Rm 1, 20.
14. Heb 1, 1-2
15. 1 Cor 2, 9.
16. Council of Trent, session 4, first decree.