Here’s whare I don’t quite follow. I simply do not believe that Christ was confronted with many questions that are of high moral import. The reason is these issues had not yet arisen. For example, there is no direct scripture on the morality of abortion, or on birth control. Even pornography has no direct scripture that is on point.
I think that had these issues been highly controverted at the time of Christ, that Christ would have answered the questions. We would know and there would be no debate among Christians.
So while I agree that Christ is the law, and that Christ does not “change his mind,” it’s not enough for me to say that all truth is in the Bible (if that’s what you are suggesting).
No, I’m not at all suggesting that all truth is in the Bible. That’s not to say the Bible doesn’t tell us the truth, it does, nor that it can’t be used to guide us when new situations arise, it can. But, the Bible alone can tell us nothing. It’s a book, actually a collection of books, not an authority. Authority lies in persons not in documents, it’s why there are courts in practically every country to interpret their laws, such as the USSC, here in the USA. It’s why Jesus gave Peter and the Apostles authority to speak in his name–and not a book, no matter how holy or good.
The Magisterium (the successors to the Apostles, who are the bishops of the Church) is the body that, like the USSC, decides matters of faith and morals using the Bible as a part of Sacred Tradition, which is also the oral teachings of the Apostles passed down to us, as well as all the previous documents of the Church. Some issues are hotly debated, but in the end, the teachings must square with what is already revealed. It’s why contraception was nixed even though many, many in the Church were strongly pushing for it.
Our Lord didn’t leave us without any proper authority to decide such things and leave us to flounder on our own. He definitely established his Church, the pope as the head of his Church on earth, and gave it the charisms of infallibility and indestructibility. We do know that deliberate abortion is wrong and why, and the same for artificial birth control and pornography. These things are not up in the air for Catholics. If other ecclesial bodies say otherwise, that is up to them, but they do not have the Magisterium Christ himself established. This is why Sola Scriptura is a false teaching–the Bible
alone cannot tell us what is morally right or what is sound doctrine.