In the OT we find God’s promised work of salvation, and the prophetic proclamation that addresses it, described metaphorically as a “building” of the “house of Israel” (Jer. 1:10; 18:9; 24:6; 31:28; 42:10; 45:4; Ezek. 36:36; Ps. 28:5). This is the root of the NT use of the concept, which is developed especially in Paul and his circle. We find five essential variations or components.