30 And now, Venerable Brethren, at the end of this Letter, our mind turns spontaneously to the subject with which we began; and we implore with our most earnest prayers the end of this most disastrous war for the sake of human society and for the sake of the Church; for human society, so that when peace shall have been concluded, it may go forward in every form of true progress; for the Church of Jesus Christ, that freed at length from all impediments it may go forth and bring comfort and salvation even to the most remote parts of the earth.
Source: Ad Beatissimi Apostolorum (Vatican.va)