48 Christ the Lord commits to the care of all who already enjoy the blessings of Redemption this duty, that they share these same blessings with their brethren who do not yet possess these heavenly graces. Now your brethren inhabit your vast colonies, well to the number of many hundred thousand, and, in a special way, they ask of you and wait for the light of evangelical truth.
Source: Saeculo Exeunte Octavo (Vatican.va)