107 As We write these words there passes before Our eyes, alas, an almost endless throng of unfortunate beings for whom We shed tears of sorrow; sick, poor, disabled, widows, orphans, and many not infrequently languishing even unto death on account of their own painful trials or those of their families. With the heart of a father We exhort all those who from whatever cause are plunged in grief and anguish to lift their eyes trustfully to heaven and to offer their sorrows to Him who will one day reward them abundantly. Let them all remember that their sufferings are not in vain, but that they will turn to their own immense gain and that of the Church, if to this end they bear them with patience. The daily use of the offering made by the members of the Apostleship of Prayer will contribute very much to make this intention more efficacious and We welcome this opportunity of recommending this Association highly, as one which is most pleasing to God.
Source: Mystici Corporis Christi (Vatican.va)