When every nation shall have heard the preaching of the Gospel, then shall come the end of the world. For at this time there are many nations, not of barbarians only, but of our own, who have not yet heard the word of Christianity.
Gloss., non occ. [ed. note: This Gloss appears to be a note of S. Thomas, in confirmation of the view of S. Chrysostom, which refers this to the taking of Jerusalem. cf. Iren Haeres. i. 2 and 3.]: But it is possible to maintain both applications of the passage, if only we will take this diffusion of Gospel preaching in a double sense. If we understand it of fruit produced by the preaching, and the foundation in every nation of a Church of believers in Christ, as Augustine (in the passage above quoted) expounds it, then it is a sign which ought to precede the end of the world, and which did not precede the destruction of Jerusalem. But if we understand it of the fame of their preaching, then it was accomplished before the destruction of Jerusalem, when Christ’s disciples had been dispersed over the four quarters of the earth.
Whence Jerome says, I do not suppose that there remained any nation which knew not the name of Christ; for where preacher had never been, some notion of the faith must have been communicated by neighbouring nations. [marg. note: Hieron. in loc.]
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).