I am a protestant who has started studying Catholic theology. One issue that is confusing to me is the historical origin of the doctrine of the seven gifts of the Holy Spirit (wisdom, understanding, counsel, knowledge, fortitude, piety, and fear of the Lord). I understand that the exegetical basis is Isaiah 11:2-3. But I am having difficulty understanding how theologians logically proceed from these gifts resting on the Messiah (which is what I draw from the Isaiah passage) to all Christians possessing these gifts (in contradistinction from the extraordinary gifts of the Holy Spirit, which St. Paul explicitly discusses in the NT).
I have read the first chapter of James Stroud, STD, on this and it was helpful:
However, I still cannot explain the logical connection between Isaiah 11:2-3 and the gifts that all Catholics are said to receive. I am sure Catholic theologians do have an argument for this and I would be grateful if someone knowledgeable would point me in the right direction with a good reference (or even explicate the details of the argument). The doctrine of the seven gifts of the Holy Spirit is a beautiful teaching, but I need to be able to fully explain all the steps in the argument starting from Isaiah 11:2-3.
I fully accept that Catholic theology doesn’t only use the Bible as a source, but I need to know what the other sources are and how they fit together to make sense of this doctrine.