5 To those therefore who are striving after supreme happiness this means of the Rosary has been most providentially offered, and it is one unsurpassed for facility and convenience. For any person even moderately instructed in his religion can make use of it with fruit, and the time it occupies cannot delay any man's business. Sacred history abounds with striking and evident examples. It is well known that there have been many persons occupied in most weighty functions or absorbed in laborious cares who have never omitted for a single day this pious practice. Combined with this advantage is that inward sentiment of devotion which attracts minds to the Rosary, so that they love it as the intimate companion and faithful protector of life; and in their last agony they embrace and hold fast to it as the dear pledge of the unfading Crown of glory . Such a pledge is greatly enhanced by the benefits of sacred indulgences , if properly employed; for the devotion of the Rosary has been richly endowed with such indulgences by both ourPredecessors and Ourselves. These favours will certainly prove most efficaciousto both the dying and the departed, being bestowed as it were by the hands ofthe merciful Virgin, in order that they may the sooner enjoy the eternal peaceand light they have desired.
Source: Fidentem Piumque Animum (Vatican.va)