16 These considerations will explain what We have already laid down concerning the fruitful advantages which are to be derived from the use of the Rosary, and the healing power which this devotion possesses for the evils of the age and the fatal sores of society. These advantages, as we may readily conceive, will be secured in a higher and fuller measure by those who band themselves together in the sacred Confraternity of the Rosary, and who are thus more than others united by a special and brotherly bond of devotion to the Most Holy Virgin. In this Confraternity, approved by the Roman Pontiffs, and enriched by them with indulgences and privileges, they possess their own rule and government, hold their meetings at stated times, and are provided with ample means of leading a holy life and of labouring for the good of the community. They are, are so to speak, the battalions who fight the battle of Christ, armed with His Sacred Mysteries, and under the banner and guidance of the Heavenly queen. How faithfully her intercession is exercised in response to their prayers, processions, and solemnities is written in the whole experience of the Church not less than in the splendour of the victory of Lepanto.
Source: Laetitiae Sanctae (Vatican.va)