No, however the
understanding of that doctrine on the part of the faithful and the Church as a whole will never remain “static”. That doctrine ‘develops’ is a dogmatic teaching of the Magisterium.
Doctrines are not fossils. They are the living, breathing tradition derived from the Apostles which “advances” and “makes progress” in the life of the Church under the direction of the Holy Spirit.
Development is not the same as “rupture”. If you plant a seed and watch it grow over sixty years, the resulting oak tree will hardly resemble the original ‘seed’ that was planted, yet the seed that was planted sixty years ago would still have been ‘oak’ seed. The latter reality was “hidden” within the seed, it just took many years for it to become apparent and “develop”.
‘Rupture’ would be an oak seed becoming a pine tree. That is impossible.
Read
Dei Verbum, from Vatican II:
vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_const_19651118_dei-verbum_en.html
We are continually advancing in our understanding of divine revelation. As the “centuries succeed one another, the church constantly moves forward” towards a purer and more accurate grasping of divine truth.
Blessed John Henry Newman wrote an influential “classic” on the development of doctrine in the middle of the 19th century. He notes:
newmanreader.org/works/development/
Those who resist legitimate development of doctrine and those who seek to “rupture” it are both acting in opposition to the will of God.
The “conservatives and fundamentalists” that the Holy Father refers to in his speech are characteristic of the former. In trying to “fossilize” and “imprison” the truth under cultural forms tailored for former times that have lost their relevance and resist the “progressing” impulses of the Holy Spirit urging believers forward towards “the complete fulfilment” of the “words of God”, these individuals are holding back the march of the Gospel.