8 Nevertheless, Venerable Brethren, though such great and numerous evils hang over us, and others still greater are to be feared for the future, we must not lose heart nor let the confident hope that rests solely on God become fainter. He who "made the nations of the earth for health" (Cf. Wisdom i, 14) without doubt will not let those perish whom He has redeemed with His Precious Blood, nor will He abandon His Church. But rather, as We said in the beginning, shall We beseech God through the mediation of the Blessed Virgin, so acceptable to Him, since, to use the words of St. Bernard: "Such is the will of God, who has wished that we should have all things through Mary." (Sermon on the Nativity of the Blessed Virgin Mary.)
Source: Ingravescentibus Malis (Vatican.va)