The source of truth for Catholics is a Person, Jesus Christ. We accept that He established a Church. He hand selected men to oversee it. Do you reject this?
Catholics seek personal divine guidance, no less than Mormons. We test the spirits, so as to not be led from Truth. We discern. Discernment includes testing ones conclusions against Truth, that is Jesus Christ. His teachings handed on once, for all, first to the Apostles who, then handed it on, and so forth, until today.
St. Paul warns the new Christian congregations to beware of people who teach falsely. We are ever cautious, about being led astray. We test our thoughts and ideas about what we believe God is telling us, against Church teaching. When/if we don’t, then we are making ourselves the source of truth, in effect, making our own church.
Yes, we, seek divine guidance, but humble ourselves before God. WE are not our own sources of truth.
Indeed, by our baptism we share in the Priesthood, Prophethood and Kingship of Jesus Christ. We are the building stones of the temple. One Body, with Christ as our head. We seek salvation individually, and are saved as A PEOPLE.
God has ALWAYS called people to him. We call this Salvation History. Short condensed…God first saved two people, Adam and Eve. Then a family, Noah, then a tribe, Abraham, then a kingdom, David. Then in Jesus Christ, the fullness of God’s salvic plan is revealed. Salvation is for ALL.
The OT temple prefigured Jesus Christ, he fulfilled their purpose, in every way. The tearing of the temple veil is a sign of this fulfillment, in Jesus Christ.
It was God who established the temple practices, priesthood, laws and governance of Israel.
Jesus did speak clearly against the Pharisees, who had turned the Law into a burden. That did not mean that the Jews were free from the Law or that Jesus freed people from the Law.
Jesus fulfilled the Law, he didn’t abrogate it. He is the New Covenant. He selected men to teach the Truth of God’s full and perfect revelation: Himself. The Good News, of Christ risen, our Salvation.
We believe that Christ has a mystical union with the Church, that is called His Bride. The Church is in the image of Jesus Christ. It is fully human and fully divine. The human aspect of it, us, is not perfect. We are called, all of us, to seek holiness, as Christ’s physical body is holy, so we should be conformed to Him.
The fear of God is a gift of the Holy Spirit.
You make a distinction where I do not, between Jesus Christ, and what is His. The Church is His, when I chose to be baptized a Roman Catholic it was a decision to follow Jesus Christ. To belong to Him as the Church does. “Church”, not being just a building or a group of likeminded people, but the Body of Christ.
You are not fully wrong. Catholics believe and accept that there is an authoritative interpreter of scripture. That doesn’t mean we don’t listen to the Word of God, for what God wants to convey to us. We should, and do.