63 The Church in Africa, as well as in other parts of the mission field, needs missionaries. Hence We appeal once again to you, Venerable Brethren, beseeching you that with every resource at your command you show your zeal in supporting all those who have been divinely called to undertake the burdens of the missionary apostolate, whether they be priests or religious men and women.
Source: Fidei Donum (Vatican.va)