Catechism of the Council of Trent

INTRODUCTORY The Necessity of Religious Instruction Such is the nature of the human mind and intellect that, although by means of diligent and laborious inquiry it has of itself investigated and discovered many other things pertaining to a knowledge of divine truths; yet guided by its natural lights it never could have known or perceived most of those things by which is attained eternal salvation, the principal end of man's creation and formation to the image and likeness of God. It is true that the invisible things of God from the creation of the world are, as the Apostle teaches, clearly seen, being understood by the things that are made: his eternal power also, and divinity. But the mystery which hath been hidden from ages and generations so far transcends the reach of man's understanding, that were it not made manifest by God to His Saints, to whom He willed to make known by the gift of faith the riches of the glory of this mystery among the Gentiles, which is Christ, man could by no effort attain to such wisdom. But, as faith cometh by hearing, it is clear how necessary at all times for the attainment of eternal salvation has been the labor and faithful ministry of an authorized teacher; for it is written, how shall they hear, without a preacher? And how shall they preach unless they be sent? And, indeed, never, from the very creation of the world, has God, most merciful and benignant, been wanting to His own; but at sundry times and in divers manners spoke to the fathers by the prophets, and pointed out to them in a manner suited to the times and circumstances, a sure and direct path to the happiness of heaven. But, as He had foretold that He would give a teacher of justice to be the light of the Gentiles, that His salvation might reach even to the ends of the earth, in these last days he hath spoken to us by his Son, whom also by a voice from heaven, from the excellent glory, He has commanded all to hear and to obey. Furthermore, the Son gave some to be apostles, and some prophets, and others pastors and teachers, to announce the word of life; that we might not be carried about like children tossed to and fro with every wind of doctrine, but holding fast to the firm foundation of the faith, we might be built together into an habitation of God in the Spirit. Lest any should receive the Word of God from the ministers of the Church, not as the word of Christ, which it really is, but as the word of man, the same Saviour has ordained that their ministry should be invested with so great authority that He says to them: He that heareth you, heareth me; and he that despiseth you despiseth me. These words He spoke not only of those to whom His words were addressed, but likewise of all who, by legitimate succession, should discharge the ministry of the word, promising to be with them all days even to the consummation of the world.