13 But in those days the people, albeit rude, ignorant, and still destitute of all civilization, were eager for life, and this no one could give except Christ, through the Church, who "came that they may have life and have it more abundantly" ( John x. 10). And truly they had life and had it abundantly, precisely because as no other life but the supernatural life of souls could come from the Church, this includes in itself and gives additional vigor to all the energies of life, even in the natural order. "If the root be holy so are the branches," said St. Paul to the Gentiles, "and thou being a wild olive art ingrafted in them, and art made partaker of the root and of the fatness of the olive tree ( Rom . xi. 16, 17).
Source: Iucunda Sane (Vatican.va)