Creator of the World
That means that everything we see, taste, experience and feel was created by God.
Created by God through His Word.
His word was Jesus Christ.
Radiance of Glory
14.48 ἀπαύγασμα, τος n: shining, either in the sense of radiance from a source or the reflection of a source of light—‘radiance, reflection.’ ὃς ὢν ἀπαύγασμα τῆς δόξης ‘who is the reflection of (God’s) glory’ or ‘who is the radiance of (God’s) glory’ He 1:3.
It is impossible to determine whether ἀπαύγασμα should be interpreted in an active sense and therefore ‘radiance,’ or in a passive sence and therefore as ‘reflection.’ If the meaning is ‘radiance,’ then one may translate this phrase in He 1:3 as ‘he shines with God’s glory’ or even ‘God’s glory shines through him.’ If one understands the meaning of ἀπαύγασμα as being ‘reflection,’ then one may often say ‘God’s glory shines back from him.’