5 It is then to a Crusade of piety and of love - and no doubt, of sacrifices also - that We rally all the sons of the one Father, all the members of the one great family, which is the family of God Himself. It belongs to the sons and to those members of the one family to share not only in the common joys, but also in the common sorrows.
Source: Nova Impendet (Vatican.va)