Originally Posted by LongingSoul
We know by the strength of Pope John Paul IIs words, the consensus of subsequent Popes and the conferences of Bishops and the wording of CCC2267, that capital punishment is to be regarded as a violation of human dignity except when used to safeguard the general community.
“Christians have always understood that at the close of the apostolic age—with the death of the last surviving apostle, John, perhaps around A.D. 100—public revelation ceased (Catechism of the Catholic Church 66–67, 73). Christ fulfilled the Old Testament law (Matt. 5:17) and is the ultimate teacher of humanity: “You have one teacher, the Messiah” (Matt. 23:10). The apostles recognized that their task was to pass on, intact, the faith given to them by the Master: “[A]nd what you have heard from me before many witnesses entrust to faithful men who will be able to teach others also” (2 Tim. 2:2); “But as for you, continue in what you have learned and have firmly believed, knowing from whom you learned it” (2 Tim. 3:14).
However, this closure to public revelation doesn’t mean there isn’t progress in the understanding of what has been entrusted to the Church. Anyone interested in Christianity will ask, “What does this doctrine imply? How does it relate to that doctrine?”
In answering these questions, the Church facilitates the development or maturing of doctrines. The Blessed Virgin Mary models this process of coming to an ever deeper understanding of God’s revelation: “But Mary kept all these things, pondering them in her heart” (Luke 2:19). It’s important to understand that the Church does not, indeed cannot, change the doctrines God has given it, nor can it “invent” new ones and add them to the deposit of faith that has been “once for all delivered to the saints.” New beliefs are not invented, but obscurities and misunderstandings regarding the deposit of faith are cleared up.
Vatican II explained, “The tradition which comes from the apostles develops in the Church with the help of the Holy Spirit. For there is a growth in the understanding of the realities and the words which have been handed down. This happens through the contemplation and study made by believers, who treasure these things in their hearts, through a penetrating understanding of the spiritual realities which they experience, and through the preaching of those who have received through episcopal succession the sure gift of truth. For, as the centuries succeed one another, the Church constantly moves forward toward the fullness of divine truth until the words of God reach their complete fulfillment in her” (Dei Verbum 8).
As we read Scripture, we see in it doctrines we already hold, each of us having been instructed in the faith before ever picking up the sacred text. This is a necessary process, as Scripture indicates. Peter explained, “There are some things in them [Paul’s letters] hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other scriptures” (2 Pet. 3:16). Those who are ignorant of orthodox Christian doctrine because they have never been taught it, or who are unstable in their adherence to the orthodox doctrine they have been taught, can twist Paul’s writings and the rest of Scripture to their own destruction. Therefore, it is important that we read Scripture within the framework of the Church’s constant tradition, as handed down from the apostles in the Catholic Church.
However, when we read Scripture in the light of the apostles’ authentic teachings, we sometimes forget that some central doctrines (such as the Trinity and the hypostatic union) were not always understood or as clearly expounded in the Church’s early days the way they are now. Understanding grew and deepened over time. As an example, consider the Holy Spirit’s divinity. In Scripture, references to it seem to jump out at us. But if we imagine ourselves as ancient pagans or as present-day non-Christians reading the Bible for the first time, we realize, for them, the Holy Spirit’s status as a divine person is not as clearly present in Scripture, since they are less likely to notice details pointing to it. If we think of ourselves as having no recourse to apostolic tradition and to the Church’s teaching authority that the Holy Spirit guides into all truth (cf. John 14:25-26, 16:13), we can appreciate how easy it must have been for the early heresies concerning the Trinity and Holy Spirit to arise.
…As these and many other cases demonstrate, doctrinal questions can remain in a not-yet-fully-defined state for years. The Church has never felt the need to define formally what there has been no particular pressure to define. This strikes many, particularly non-Catholics, as strange. Why weren’t things cleared up in, say, A.D. 100, so folks could know what’s what? Why didn’t Rome issue a laundry list of definitions in the early days and let it go at that? Why wasn’t an end-run made around all these troubles that plagued Christianity precisely because things were unclear? The remote reason is that God has had his own timetable and set of reasons (to which we aren’t privy) for keeping it. The same could be said about Old Testament prophets: Why didn’t they understand the fullness of the doctrine of the Trinity all at once? Or the identity of the Messiah? Or the fullness of Christian teaching? Partly because God had not revealed it all yet, and partly because their understanding of the implications of the doctrines they had needed to grow clearer over time."
catholic.com/tracts/can-dogma-develop