I notice you did not include the Magesterium in that grouping. Step in the right direction!
The Apostles were the beginning of the Magesterium.
As you can see, people can read a single, seemingly simple passage, and disagree on the interpretation of it. (Hence, the tragic growth in the number of Prot. denominations.) At some point, there needs to be an Authority. The Father sent the Son. The Son sent the Apostles. We Catholics trace our ties back to these men, and our Magesterium are their apostolic successors.
The only other solution is to flip a coim, hmmm - shall we believe Pastor X or Pastor Y or even Diego1618. It may be hard for you to believe, but there are men more wise and learned on Scripture and Theology than you, or even I. I worship in Peter's Church, not Diego1618's.