10 And you, Venerable Brethren, - the more you have at heart the honour of Mary, and the welfare of human society, the more diligently apply yourselves to nourish the piety of the people towards the great Virgin, and to increase their confidence in her. We believe it to be part of the designs of Providence that, in these times of trial for the Church, the ancient devotion to the august Virgin should live and flourish amid the greatest part of the Christian world. May now the Christian nations, excited by Our exhortations, and inflamed by your appeals, seek the protection of Mary with an ardour growing greater day by day; let them cling more and more to the practice of the Rosary, to that devotion which our ancestors were in the habit of practicing, not only as an ever-ready remedy for their misfortunes, but as a whole badge of Christian piety. The heavenly Patroness of the human race will receive with joy these prayers and supplications, and will easily obtain that the good shall grow in virtue, and that the erring should return to salvation and repent; and that God who is the avenger of crime, moved to mercy and pity may deliver Christendom and civil society from all dangers, and restore to them peace so much desired.
Source: Supremi Apostolatus Officio (Vatican.va)