We have been learning about the centrality of the visible church in God’s dealings with men. This centrality helps us correctly understand one of the ways the NT identifies the Church – the Church is Mount Zion, the city of the Living God, the heavenly Jerusalem. Throughout the OT Jerusalem occupies central place, is at the center of God’s dealings in the Judaic Age. In the Messianic Age, Jerusalem is no less central; for Jerusalem is the mother of us all and is the Church, the city of the Living God. So how does this help us understand why we as the people of God are to sing the psalms and the meaning we are to ascribe to them.