16 And what object could be more worthy of our prayer, and more in keeping with the adorable person of Him who is the only "mediator of God and men, the Man Jesus Christ" (I Tim. ii. 5), than to beseech Him to preserve on earth faith in one God living and true? Such prayer bears already in itself a part of its answer; for in the very act of prayer a man unites himself with God and, so to speak, keeps alive on earth the idea of God. The man who prays, merely by his humble posture, professes before the world his faith in the Creator and Lord of all things; joined with others in prayer, he recognizes, that not only the individual, but human society as a whole has over it a supreme and absolute Lord.
Source: Caritate Christi Compulsi (Vatican.va)