Ray Ortlund Jr. preaches about the significance of the church being the salt of the earth and light of the world, emphasizing the importance of the church's condition for the world. He delves into Isaiah 63:7-64:12, teaching how to pray when living in the shadows, urging believers to seek a fresh visitation from God. Ortlund highlights the need for intelligent argument in prayer, grounding requests in God's nature and promises. He explores Isaiah's prayer, encouraging believers to pray with confidence for a renewed experience of God's love and to seek God's revival in the church.