I don’t presume to have the mind of God.
Dear, I was not asking for some infallible pronouncement, only your opinion!
Why do you think He gave authority to the Apostles that would continue past their deaths?
I will give you my opinion on this. I think He did this because He established a Church, which He intended to be His Body on earth. He intended that all members of His Body be nourished and guided by that Church, of which He is the Head. He knows the hearts of people, and knew that they needed people in authority to guide them.
Code:
What is insufficient about Scripture that we need ongoing revelation or authority?
We do not need ongoing Revelation and Authority because Scripture is insufficient, we need it because humans are insufficient. The Revelation is to lead us into all truth. We are falling and finite creatures, and cannot find the Truth without divine intervention.
2 Peter 3:16
There are some things in them hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other scriptures.
The Revelation and Authority prevent us from distortion as we read them.
What truths are contained in the Catholic teachings that are essential to our faith that are not already contained in the most original Apostolic teachings preserved in Scripture?
The manner in which the writings are to be understood. You can easily see this with the plethora of interpretations. For example, I am in dialogue with a forum member who believes that baptism has nothing to do with water. When I imagine him in the room with the 12, I see them all appalled that he should even propose such a preposterous notion. However, he has been trained in a very anti-Catholic, anti-Sacramental tradition, so he cannot possibly accept any “rituals” as valid.
And if simpletons were capable of grasping and submitting to Jesus’ good news as it fell from His lips, why does anyone think that something additional is needed today in order to gain salvation?
Sacred Tradition is not “additional” to the Words of Christ, but part of them, they proceed from the same Source, the written and the unwritten Word. Those that reject the Sacred Tradition reject part of Jesus good news, and that is where the revelation begins to become diluted.
Like with parents instructing their children in the hopes to pass on family tradition, the children sometimes go astray. They were hopeful. Jesus prophesied that there would be error amongst the church.
Yes, and He also prophesied that He Himself would prevent that error from destroying the Church.