The radiance of God's glory.

Hebrews 1:3: 'He is the radiance of the glory of God and the exact imprint of his nature, and he upholds the universe by the word of his power.'

Radiance — like light from the sun. Jesus shines with God's own glory.

Exact imprint — like a seal pressed into wax. He's the perfect representation of God.

And he upholds the universe — every atom, every galaxy — by his word.

Then: 'he sat down at the right hand of the Majesty.' Sat down means the work is done. Salvation is finished.