Hebrews 1:6 (NASB), “And when He again brings the firstborn into the world, He says, "AND LET ALL THE ANGELS OF GOD WORSHIP HIM.”
Why would God command His angels to worship the Son if the angels were already worshiping a Son in heaven before the Son’s virgin conception and birth?
How can Trinitarians believe that a coequal and coeternal (timeless) God the Son was a pre-incarnate God the firstborn before actually being born? Can God as God literally be a God the firstborn before he was actually born? The only viable understanding of the word “firstborn” in relation to Christ Jesus is that he was “firstborn” in the prophetic mind and planning of God just as he was already called “the Lamb slain from the foundation of the world” in Revelation 13:8. Therefore, the God who calls the things which be not as though they were (Romans 4:17), had already spoke of Christ as being first slain and firstborn before he was actually slain and born.
The Son of God is also called “the image of the invisible God, the firstborn of all creation” in Colossians 1:15 before the Son was actually born. Hence, God literally brought forth his “firstborn into the world” after the Son was “foreknown before the foundation of the world” (1 Peter 1:20). For why else would the angels have been commanded to worship the Son after being brought into the world if the angels were already worshiping the Son as an alleged pre-incarnate God the firstborn? Therefore, the Son could not have timelessly existed as a God the Son because the angels would not have been commanded to worship the Son if they had always been worshipping the Son as the Son in the first place.