Apostolic Letter in the Form of Motu Proprio
Ubicumque et Semper
It is the duty of the Church to proclaim always and everywhere the Gospel of Jesus Christ. He, the first and supreme evangelizer, commanded the Apostles on the day of his Ascension to the Father: "Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you" (Mt 28:19-20). Faithful to this mandate, the Church--a people chosen by God to declare his wonderful deeds (cf. 1 Peter 2:9)--ever since she received the gift of the Holy Spirit on the day of Pentecost (cf. Acts 2:14), has never tired of making known to the whole world the beauty of the Gospel as she preaches Jesus Christ, true God and true man, the same "yesterday and today and for ever" (Heb 13:8), who, by his death and Resurrection, brought us salvation and fulfilled the promise made of old. Hence the mission of evangelization, a continuation of the work desired by the Lord Jesus, is necessary for the Church: it cannot be overlooked; it is an expression of her very nature.