CIC 754 “The Church is, accordingly, a sheepfold, the sole and necessary gateway to which is Christ. It is also the flock of which God himself foretold that he would be the shepherd, and whose sheep, even though governed by human shepherds, are unfailingly nourished and led by Christ himself, the Good Shepherd and Prince of Shepherds, who gave his life for his sheep.”1
CIC 755 “The Church is a cultivated field, the tillage of God. On that land the ancient olive tree grows whose holy roots were the prophets and in which the reconciliation of Jews and Gentiles has been brought about and will be brought about again. That land, like a choice vineyard, has been planted by the heavenly cultivator. Yet the true vine is Christ who gives life and fruitfulness to the branches, that is, to us, who through the Church remain in Christ, without whom we can do nothing.”2
CIC 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 corner-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.”3
CIC 757 “The Church, further, which is called ‘that Jerusalem which is above’ and ‘our mother’, is described as the spotless spouse of the spotless lamb. It is she whom Christ ‘loved and for whom he delivered himself up that he might sanctify her.’ It is she whom he unites to himself by an unbreakable alliance, and whom he constantly ‘nourishes and cherishes.’”4
1 LG 6; cf. Jn 10:1-10; Isa 40:11; Ezek 34:11-31; Jn 10:11; 1 Pet 5:4; Jn 10:11-16.
2 LG 6; cf. 1 Cor 39; Rom 11:13-26; Mt 21:32-43 and parallels; Isa 51-7; Jn 15:1-5.
3 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.
4 LG 6; Cf. Gal 4:26; Rev 12:17; 19:7; 21:2,9; 22:17; Eph 5:25-26,29.