Lecture 1, The Holiness of God:

Holy, holy, holy is the Lord of Hosts. The whole world is filled with his glory.” This echoing refrain from the lips of the angels clarifies the majesty and awe of “The Holiness of God”. When that emphasis is grasped, and when the people of God catch that same vision, the same thing that happened to Isaiah happens to us. We are overwhelmed. And we are driven to the ground in worship.