The Word could be written in our world, because the art of writing existed here from the most ancient times, at first on tablets, then on parchment, later on paper, and finally it could be disseminated in print. The Lord’s providence caused this for the sake of the Word.
The Word could then be circulated throughout this world, because all peoples here are in contact, not only by travels abroad, but also voyages to every part of the globe. Thus the Word, once written, could be spread from one people to another and be taught everywhere.
from Life on Other Planets, Sections 115, 116