5 It remains to be added that great value and utility accrue to the Rosary fromthe abundance of privileges and favours which adorn it, and more particularlyfrom the rich treasures of indulgences attached to it. It is evident how greatlyto the advantage of all who are solicitous for their eternal salvation is the obtaining of these benefits. For it is a question ofobtaining either totally or partially a remission of the debt of temporalpunishment which, even after guilt has been forgiven, must be paid either inthis life or in the next. Vast indeed is the treasure won by the merits ofChrist, His Mother and the Saints, to which our predecessor Clement VI. so aptlyapplied those words of the Book of Wisdom: "She is an infinite treasure tomen: which they that use become the friends of God" (Wisdom vii., 14).
Source: Diuturni Temporis (Vatican.va)