brightness of his glory
1:3 brightness of his glory. “Brightness” is from a Greek word used only here in the New Testament, literally meaning “off-flashing.” In context of both this passage and modern astronomy, it could well be understood as “radiation.” As the “express image” of the Father, the Son of God is analogous to the life-giving rays from the sun. Just as the Father dwells “in the light which no man can approach unto” (I Timothy 6:16), so can no man gaze long at the sun without being blinded. Yet, physically speaking, as the sun’s radiation provides both light and life to the world, so the Son is spiritually both the “light of the world” (John 8:12), and the “life” of the world (John 1:14; 14:6; Acts 17:28). See also notes on Psalm 19:1; 65:8; Micah 5:2.