78 The Church has received the Gospel as a proclamation and a source of joy and salvation. She has received it as a gift from Jesus, sent by the Father "to preach good news to the poor" (Lk 4:18). She has received it through the Apostles, sent by Christ to the whole world (cf. Mk 16:15; Mt 28:19-20). Born from this evangelizing activity, the Church hears every day the echo of Saint Paul's words of warning: "Woe to me if I do not preach the Gospel!" (1 Cor 9:16). As Paul VI wrote, "evangelization is the grace and vocation proper to the Church, her deepest identity. She exists in order to evangelize". Evangelization is an all-embracing, progressive activity through which the Church participates in the prophetic, priestly and royal mission of the Lord Jesus. It is therefore inextricably linked to preaching, celebration and the service of charity. Evangelization is a profoundly ecclesial act, which calls all the various workers of the Gospel to action, according to their individual charisms and ministry. This is also the case with regard to the proclamation of the Gospel of life, an integral part of that Gospel which is Jesus Christ himself. We are at the service of this Gospel, sustained by the awareness that we have received it as a gift and are sent to preach it to all humanity, "to the ends of the earth" (Acts 1:8). With humility and gratitude we know that we are the people of life and for life, and this is how we present ourselves to everyone.
Source: Evangelium Vitae (Vatican.va)