“The first glorious thing we learn about the person of Christ is that he is the perfect revelation of the Father. This revelation of the Father is for the benefit of the church, for we behold ‘the glory of God in the face of Jesus Christ’ (2 Cor. 4:6) …. He is the ‘brightness of the Father’s glory, and the express image of his person’ (Heb 1:3). He is the image of the invisible God …

“But Christ is specially glorious because he and he alone perfectly reveals God’s nature and will to us. Without Christ we would have known nothing truly about God for he would have been eternally invisible to us. We would never have seen God at any time, either in this life or the next (John 1:8).”

John Owen, The Glory of Christ, Banner of Truth Trust, 1994, 11.

The brightness of the Sun compare to the glory of the Father.