With Ad Gentes 28, we begin chapter V, “Planning Missionary Activity“
The Christian faithful, having different gifts (cf. Rom. 12:6), according to each one’s opportunity, ability, charisms and ministry (cf. 1 Cor. 3:10) must all cooperate in the Gospel. Hence all alike, those who sow and those who reap (cf. John 4:37), those who plant and those who irrigate, must be one (cf. 1 Cor. 3:8), so that “in a free and orderly fashion cooperating toward the same end,” they may spend their forces harmoniously for the building up of the Church.
Wherefore, the labors of the Gospel heralds and the help given by the rest of the Christian faithful must be so directed and intertwined that “all may be done in order” (1 Cor. 14:40) in all fields of missionary activity and cooperation.
The bishops pick up on that teamwork notion from the end of the previous chapter. In future posts, you’ll see them addressing the role of bishops, conferences, the pope, the curia, and missionary institutes themselves.