Rev 21, 3-4 God himself will always be with them

(Rev 21, 3-4) God himself will always be with them

[3] I heard a loud voice from the throne saying, "Behold, God's dwelling is with the human race. He will dwell with them and they will be his people and God himself will always be with them (as their God). [4] He will wipe every tear from their eyes, and there shall be no more death or mourning, wailing or pain, (for) the old order has passed away."

(CCC 756) "Often, too, the Church is called the building of God. The Lord compared himself to the stone which the builders rejected, but which was made into the comer-stone. On this foundation the Church is built by the apostles and from it the Church receives solidity and unity. This edifice has many names to describe it: the house of God in which his family dwells; the household of God in the Spirit; the dwelling-place of God among men; and, especially, the holy temple. This temple, symbolized in places of worship built out of stone, is praised by the Fathers and, not without reason, is compared in the liturgy to the Holy City, the New Jerusalem. As living stones we here on earth are built into it. It is this holy city that is seen by John as it comes down out of heaven from God when the world is made anew, prepared like a bride adorned for her husband (LG 6; cf. 1 Cor 3:9; Mt 21:42 and parallels; Acts 4:11; 1 Pet 2:7; Ps 118:22; 1 Cor 3:11; 1 Tim 3:15; Eph 2:19-22; Rev 21:3; 1 Pet 2:5; Rev 21:1-2). (CCC 1186) Finally, the church has an eschatological significance. To enter into the house of God, we must cross a threshold, which symbolizes passing from the world wounded by sin to the world of the new Life to which all men are called. The visible church is a symbol of the Father's house toward which the People of God is journeying and where the Father "will wipe every tear from their eyes" (Rev 21:4). Also for this reason, the Church is the house of all God's children, open and welcoming.