Hebrews 1:1-4 (ESV)
1Long ago, at many times and in many ways, God spoke to our fathers by the prophets, 2but in these last days he has spoken to us by his Son, whom he appointed the heir of all things, through whom also he created the world. 3He 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. After making purification for sins, he sat down at the right hand of the Majesty on high, 4having become as much superior to angels as the name he has inherited is more excellent than theirs.
Who is Jesus Christ? A good man? A wise man? A prophet, like Mohammed?
Verse 3a: He is the radiance - why the word "radiance?" Because Jesus embodies the Source, the power. What is the difference between the sun and the moon? The sun has an internal source, or is a source that radiates heat and light in the sky. The moon merely reflects, having no internal power of its own. He is not like the moon, a dead orb which only reflects the light.
Verse 3b: He is. . . the exact imprint - everything that God is, Jesus is. If God is eternal, Jesus Christ is eternal. Jesus was not created at a point in time; He always was and will be.
This, I believe.