The King of Glory

How is the 'peace of Jerusalem' here a metaphor for Christ the Peace of Spiritual Jerusalem, His church? How is Zion a picture of Christ saving His people out from a dry and desolate place? What do the 'gates of hell' stand for? Have the shadows and pictures of the Old Testament been removed by Christ and His finished work? How does false religion 'hang' salvation on the sinner's work? How can we trace everything to Christ's death on the cross? How is Christ the Love of God personified for His people?