When the Catholic Church appears to teach "new doctrines"
about Mary, it is often a statement of truth against some
current errors or a clarification of truths that have always
been taught and believed by Christians through the centuries.
The Church believes that handing on these truths participates
in the admonition of Paul.
2 Thessalonians 2:15
Therefore, brothers, stand firm and hold fast to the
traditions that you were taught, either by an oral
) or by a letter (