As infallibility is the essence of Christ’s institution of His Catholic Church, it is the bedrock of all of the dogmas and doctrines by which we know truth from error in faith and morals, that Sacred Scripture is the Word of God, and one with Sacred Tradition and the Magisterium.
**When Christ instituted His Church He specifically mandated:
You are Peter and on this rock I will build MY Church." (Mt 16:18) **
“The gates of hell will not prevail against it.”(Mt 16:18)
I will give you the keys of the Kingdom of heaven." (Mt 16:19)
“Whatever you bind on earth will be bound in heaven.” (Mt 16:19) [Later, also to the Twelve]. [My emphasis]
To St Peter alone – Sole authority:
“Strengthen your brethren.” (Lk 22:32)
“Feed My sheep.”(Jn 21:17).
This very clearly then is why Christ established His Magisterium (teaching authority) in St Peter (His first Pope) and his successors who proclaim the truths of faith and morals in dogma and doctrine, and not to everyone who “feels’ they want to preach to others:
“I will not leave you orphans; I will come to you." (John 14:15-18) “The Advocate, the Holy Spirit that the Father will send in My name, He will teach you everything and remind you of all that I told you.” (John 14:26) “But when He comes, the Spirit of truth, He will guide you to all truth. He will not speak on His own, but He will speak what He hears, and will declare to you the things that are coming. He will glorify Me, because He will take from what is mine and declare it to you. Everything that the Father has is mine; for this reason I told you that He will take from what is mine and declare it to you.” (John 16:13-15).
And, behold, I am with you always, until the end of the age.” (Mt 28: 20).
This is the clearest summation of the requirements for both dogma and doctrine:
The three levels of teaching from *Ad Tuendam Fidem
(ATF), which gives examples, are:
1) Dogma – infallible (Canon #750.1) to be believed with the assent of divine and Catholic faith.
2) Doctrine – infallible (Canon #750.2) requires the assent of ecclesial faith, to be “firmly embraced and held”.
3) Doctrine – non-definitive (non-infallible) and requires intellectual assent (“loyal submission of the will and intellect”, Vatican II, Lumen Gentium 25), not an assent of faith. See the Explanatory Note on ATF by the Congregation for the Doctrine of the Faith
Rome, from the offices of the Congregation for the Doctrine of the Faith, June 29, 1998, the Solemnity of the Blessed Apostles Peter and Paul.
- Joseph Card. Ratzinger
Prefect
- Tarcisio Bertone, S.D.B.
Archbishop Emeritus of Vercelli
Secretary
[This commentary was issued coincident with the promulgation of “Ad tuendam fidem” by Pope John Paul II, modifying the Oriental and Latin codes of canon law.]
See the examples given at:
ewtn.com/library/CURIA/CDFADTU.HTM
Thus no dogma has to be affirmed, nor anyone anathematized, nor the word “define” or “definition” be used for an infallible papal teaching – only that the Pope is handing down a certain, decisive judgment for the whole Church, that a point of doctrine on faith or morals is true and its contrary false. The words *ex cathedra *are never included.
That is how we distinguish truth from error.