50 Such is the marvelous doctrine of love and peace which has been such an ennobling factor in the civil and religious progress of mankind. And the heralds who proclaimed it, moved by supernatural charity, not only tilled the land and cared for the sick, but above all they reclaimed, moulded and raised life to divine heights, directing it toward the summit of sanctity in which everything is seen in the light of God. They have raised mansions and temples which show to what lofty and kindly heights the Christian ideal urges man; but above all they have made of men, wise or ignorant, strong or weak, living temples of God and branches of the very vine which is Christ. They have handed on to future generations the treasures of ancient art and wisdom and have secured for them that inestimable gift of eternal wisdom which links men as brothers by the common recognition of a supernatural ownership.
Source: Summi Pontificatus (Vatican.va)