0 To Our Venerable Brethren the Patriarchs, Primates, Archbishops, Bishops, and other Ordinaries in Peace and Communion with the Apostolic See. The Catholic Church, that imperishable handiwork of our all-merciful God, has for her immediate and natural purpose the saving of souls and securing our happiness in heaven. Yet, in regard to things temporal, she is the source of benefits as manifold and great as if the chief end of her existence were to ensure the prospering of our earthly life. And, indeed, wherever the Church has set her foot she has straightway changed the face of things, and has attempered the moral tone of the people with a new civilization and with virtues before unknown. All nations which have yielded to her sway have become eminent by their gentleness, their sense of justice, and the glory of their high deeds.
Source: Immortale Dei (Vatican.va)