This passage illustrates the wonder of the Gospel. I believe It is one the most wonderful demonstrations of the grace of God that you get in the whole of the Scriptures.
This Address is about a prophet who saw the glory of God. Isaiah is the prophet most quoted in the New Testament and he had a unique impression of the glory of Christ.
Some of the glories of Christ can be seen in type through the words of Moses who asked, “Let me, I pray Thee, see Thy glory” (Ex 33:18). Moses was permitted to see God from behind. He was placed in a cleft of the rock, and God’s goodness passed before him. God is glorified in His goodness, and Moses was wonderfully privileged to be on the mount and to see the glory of God shining in Christ. But, by the Spirit, we can look upon the glory of the Lord.