Browsing through the Bull Munificentissimus Deus, in which Papa Pacelli defined the dogma of our Blessed Lady's Bodily Assumption, I noticed a particular phrase on the very edge of the formal definition itself.
The pope explained that one reason for the definition was personal: he wished to leave a monumentum aere perennius of his burning love for the Theotokos.
A 'memorial more long-lasting than bronze' is the exact phrase used by Quintus Horatius Flaccus as he concluded the first three books of his Carmina: a work by which he hoped to secure immortal renown as the man who spun the 'Aeolian song' of Sappho and Alcaeus into Latin poetry.
I wonder whether any other Infallible pronouncement of the Church's Magisterium has ever been introduced in such a way. It is not easy to imagine Trent beginning with something juicy by Catullus, or Nicaea I being introduced with a line from Aristophanes.
... um er ... genre confusion ... um er ...
And just you get this gigantic coincidence: Horace's birthday was December 8, Feast of our Lady's Holy and Immaculate Conception.
When Pope Leo XIV issues his mighty Constitutio Dogmatica Apostolica necnon et Synodica cancelling e radicibus the entire (ita dictum) "Magisterium" of PF, I wonder what might be a suitable literary quotation to accompany it.
Surely somebody can offer a helpful suggestion? It doesn't have to be from Juvenal or even Milton.