This is the relevant text from Fr. Longenecker’s blog: I realize that our non-Catholic brethren have a real problem with the Assumption because it isn’t in the Bible. In fact, the evidence for the historicity of the Assumption is pretty scant in the early centuries as well.
What I love about Pius XII’s statement in
Munificentissimus Deus is how he piles up the truths of the incarnation and says how the Assumption was ‘necessary’.
source:
here You’ll notice first of all that he says early evidence is “scant” not non-existent. You’ll notice second of all that he says the document Munificentissimus Deus explains the necessity of the Assumption by drawing from the truth of the Incarnation.
The doctrine of the Immaculate Conception was the first dogma promulgated simply by an infallible papal decree (rather than through a Council), and it came at a time when Papal infallibility was being questioned. It thus served the purpose, in addition to promoting an important doctrine drawn from the meaning of the Incarnation, of illustrating the extent of papal infallibility.
The doctrine of the Assumption was promulgated in response to secularist attempts to deny the sanctity of the body and the existence of the soul. These ideas were influencing Catholic theologians who started to doubt the meaning of Mary’s sanctity which is a picture of the sanctity imparted to every Christian by baptism. It remains relevant because it shows us that God wants to save the whole human person, body and soul.
These doctrines also reveal to us that Christ came to destroy sin (the Immaculate Conception) and death (the Assumption). Thus they are stamped with the very meaning of the Redemption. God reveals things to us in many ways, not just by telling us but by showing us. Thus He showed us that Jesus is His own Son by having Him born of a virgin. Strictly speaking, He did not need Mary to have been a virgin; Jesus could have been born without a human father even if Mary had already had several children. But God shows us the importance of Christ in a more glorified way by having Him born of one who never had sex at all, and never after. A lot of people say these doctrines aren’t necessary and the implication is that God could still have saved us without doing things the way He did. That may be true, but it’s irrelevant. God has chosen to save us
this way, and revealed
these doctrines to teach us what salvation means. We ought to rejoice in this, and that is why they have been promulgated to the level of dogma.
I hope that helps. God bless!