77 While We earnestly lift Our voice in urgent exhortation in behalf of the Missions of Africa, Our thoughts, as you well know, Venerable Brethren, are not unmindful of those other sons of Ours who are devoting themselves to advancing the Church's cause in the other continents. We love them all, especially those who are undergoing extraordinary sufferings in the Far East. Although the unusual conditions in Africa have been the occasion of this Encyclical, We do not wish to bring it to a close without taking a final look at all the missionary activities of the Catholic Church.
Source: Fidei Donum (Vatican.va)