According to the Roman Catholic view, Jesus is the Lord in the Church and through the Church, but not over the Church in the sense that he alone defines the word of the Church through the apostolic witness and makes this word secondary to that witness.
Otto Weber, Foundation of Dogmatics, vol. 1, p. 40
It is easy to simplify things and state that all the differences between Rome and Christianity come down to authority. Nevertheless, all differences must at the very least start there. Until this issue is resolved, there can be no meaningful rapprochement with Rome. Rome says that what the Church says about the Apostolic witness is more important than the witness itself. Jesus may help and guide the Church in her dogmatic decrees, but her decrees always take precedence over whatever Jesus or the apostles have decreed.
This should not be taken as an assertion that Protestants have it all together. We may have a better creed, but for many it is little more than that: “I believe,” but not “I do.” Sola Scriptura and Regula Fidei are nice slogans to sling around, but they have little bearing on how we relate to God, society, or one another. The arrogance of Roman autonomy is little better than Evangelical insolence.
…in mysteries of the faith common sense is not our adviser, but with quiet teachableness and the spirit of gentleness (which James commends) we receive the doctrine given from heaven.
John Calvin, Institutes, 4.17.25