If you want a better idea of what these texts mean, you have to look for the "mind of the Church," because Jesus promised to send the Holy Spirit to guide the Church in all His teachings.
To get the "mind of the Church" a good place to look is the consensus of the Fathers. This is not "every opinion of the Fathers," since they are as fallible as ealgeone or Mrs. Don-o.
But on those points on which they were in substantial agreement, you get a snapshot of how the Holy Spirit was leading the Church.
If not... well, how would YOU go about showing how the Holy Spirit was guiding the Church in the 2nd, 3rd, 4th, 5th centuries? Who exemplified the correct way --presumably, the Protestant way--- in those centuries?
I'm interested. List the centuries, and name names.
So if the Holy Spirit is guiding the church, then that would mean that He guides the college of cardinals in their selection of the new pope.
Correct?