Pope Paul VI
1. The eightieth anniversary of the publication of the encyclical Rerum Novarum, the message of which continues to inspire action for social justice, prompts us to take up again and to extend the teaching of our predecessors, in response to the new needs of a changing world. The Church, in fact, travels forward with humanity and shares its lot in the setting of history. At the same time that she announces to men the Good News of God's love and of salvation in Christ she clarifies their activity in the light of the Gospel and in this way helps them to correspond to God's plan of love and to realize the fullness of their aspirations.
2. It is with confidence that we see the Spirit of the Lord pursuing his work in the hearts of men and in every place gathering together Christian communities conscious of their responsibilities in society. On all the continents, among all races, nations and cultures, and under all conditions the Lord continues to raise up authentic apostles of the Gospel.