Evangelii Gaudium §12

12. Though it is true that this mission demands great generosity on our part, it would be wrong to see it as a heroic individual undertaking, for it is first and foremost the Lord’s work, surpassing anything which we can see and understand. Jesus is “the first and greatest evangelizer”.[9] In every activity of evangelization, the primacy always belongs to God, who has called us to cooperate with him and who leads us on by the power of his Spirit. The real newness is the newness which God himself mysteriously brings about and inspires, provokes, guides and accompanies in a thousand ways. The life of the Church should always reveal clearly that God takes the initiative, that “he has loved us first” (1 Jn 4:19) and that he alone “gives the growth” (1 Cor 3:7). This conviction enables us to maintain a spirit of joy in the midst of a task so demanding and challenging that it engages our entire life. God asks everything of us, yet at the same time he offers everything to us.

[9] Paul VI, Apostolic Exhortation Evangelii Nuntiandi (8 December 1975), 7: AAS 68 (1976), 9.