Evangelii Nuntiandi §13

13. Those who sincerely accept the Good News, through the power of this acceptance and of shared faith therefore gather together in Jesus' name in order to seek together the kingdom, build it up and live it. They make up a community which is in its turn evangelizing. The command to the Twelve to go out and proclaim the Good News is also valid for all Christians, though in a different way. It is precisely for this reason that Peter calls Christians "a people set apart to sing the praises of God,"[32] those marvelous things that each one was able to hear in his own language.[33] Moreover, the Good News of the kingdom which is coming and which has begun is meant for all people of all times. Those who have received the Good News and who have been gathered by it into the community of salvation can and must communicate and spread it.

32. 1 Pt 2:9.

33. Cf. Acts 2:11.