203 Here, Christ is referred to not as the foundation (Isa. 28:16) but as the cornerstone, because the main concern here is not the foundation but the cornerstone that joins together the two walls, one wall being the Jewish believers, and the other, the Gentile believers. Here, not Christ but the apostles and prophets who received the revelation concerning Christ are stressed as the foundation. When the Jewish builders rejected Christ, they rejected Him as the cornerstone (Acts 4:11; 1 Pet. 2:7), the One who would join the Gentiles to them for the building of God's house.