Ahh, word games.
WHO has the presumed authority to "PROPERLY" understand and interpret these things?
Those to whom Jesus Christ gave his teaching and the authority to do so, and those to whom they in turn passed on that teaching and authority.
You can see how it works in Paul's letters to Timothy.
He says to Timothy Hold to the standard of sound teaching that you have heard from me, in the faith and love that are in Christ Jesus.
Paul has given Timothy sound teaching.“Guard the good treasure entrusted to you, with the help of the Holy Spirit living in us.”
Timothy is to be a guardian
of the truth that has been entrusted
to him. He is to do this with the help of the Holy Spirit.
Then Paul instructs Timothy to pass this precious treasure of teaching on to others.“You then, my child, be strong in the grace that is in Christ Jesus; and what you have heard from me through many witnesses entrust to faithful people who will be able to teach others as well.”
So Timothy in his turn is to entrust what he has been given to faithful people
. Not just preaching to others but to pass on in trust this teaching to others he can be sure will guard
it in their turn. Then they will be able to teach others
Thus we have four generations – Paul – Timothy – those to whom Timothy entrusts the teaching – those who they pass it on to in turn.
Remember, the catholic "church" has ONLY officially interpreted 0.01% of the Bible.
The Catholic Church came before the Bible.
Jesus passed on his teaching to the apostles before a word of the NT was written. We don't START with the Bible.