Since the author of Hebrews is writing for the Hebrews, he is quoting the Tanakh, and I don't find in the Tanakh any evidence that God would worship the Messiah as God. We have no historical evidence that Hebrews, either at the time of Jesus or at the time the epistle was written, considered that God would worship the Messiah as God.
[Dwight] Just because the Father calls the Son "God", that does not mean that He is worshiping Him. He is simply acknowledging the truth of who the Son is. Obviously, God is proud of His Son and He loves Him and He even seems to boast about Him - God says in at least two places in the New Testament that this is His beloved Son, in whom He is well-pleased. But none of that is worship on God's part. He does, however, command that the angels worship Him and that WE worship Him. Yet, ONLY GOD is to be worshiped.
[Dwight] "Exhibit O" God commands even the angels to worship His Son, and we too are commanded to worship Him Psalm 2:12. Yet from the beginning of Creation, ONLY GOD is to be worshiped. Therefore, Jesus is God.
Besides, the author addressing the Hebrews, let us know in several other places that Jesus is not God.
[Dwight] Really? Which verse is that that says Jesus is not God?
For example, the author presents Jesus as a High Priest, a Mediator before God. A high priest or Mediator could never be God in Hebrew's mind.
[Dwight] Isaiah 59:16 "And He saw that there was NO MAN, and was astonished that there was no one to intercede; THEN HIS OWN ARM BROUGHT SALVATION TO HIM, and HIS righteousness upheld Him."
[Dwight] God saw that we humans could not save ourselves, so He came to earth in the form of Jesus, to save us.
[Dwight] " ... God was in Christ reconciling the world to Himself ..." 2 Corinthians 5:19
Then, how the author of the epistle could contradict himself?
[Dwight] There's no contradiction. God, in Christ, became His own mediator.
That's why I believe that when the author states: "But to the Son He says..." he is directing us to the portion of the text in which God has anointed the Messiah, since the very meaning of Messiah is anointed.
[Dwight] So if that were true, then you are conveniently skipping over all of Psalm 45, verse 6 and the first phrase of verse 7, which says:
6 -"Your throne, O God, is forever and ever; a scepter of uprightness is the scepter of Your kingdom." and 7 "You have loved righteousness and hated wickedness;" (which is essentially the same as skipping over Hebrews 1:8 and the first phrase of verse 9) Sorry, but I can't let you ignore the part that you left out, which is the part where God calls His Son "GOD", both in Hebrews and in Psalms.
Besides, please notice that the Messiah is placed at the level of other beings called "your companions".
[Dwight] Once again, you LEFT OUT the KEY WORD that doesn't agree with your doctrine. The key word is "ABOVE". "Therefore God, Your God, has anointed You with the oil of gladness ABOVE Your companions." You disregard phrases, whole sentences, and words that don't fit into your doctrine. It appears to be a habit with you. We, in the body of Christ, are His companions, or as He put it, His brothers, His sisters, and His mother. He is ABOVE us, as far as God is above humans.
The author calls God "your God" (the God of Jesus). This goes in line with what we have been saying: that Jesus worships God, just as you and me. So Jesus can't be God by definition.
[Dwight] The Father - God - just called His Son "God" in Hebrews 1 verse 8, so how could anything in verse 9 about His anointing contradict that? It can't.
Also, we already know that Jesus has called the Father "My God" in John 20:17. Nothing new there. We have discussed that before. But since God called His Son "God", then your conclusion that Jesus can't be God goes DIRECTLY AGAINST the word of God Himself in Hebrews 1:8.
"therefore God, your God, anointed you
with the oil of gladness above your companions." (Psalm 45:7)