In this first chapter of Hebrews, the author quotes extensively from the Old Testament to demonstrate the superiority of the Son over the angels. That may seem like an unnecessary argument to us today. But within the context of this letter, it fits. The author is demonstrating the superiority of the Son over everything else that his Jewish audience might look to.
He also says,
Hebrews 1:10-12 NIV
“In the beginning, Lord, you laid the foundations of the earth,
and the heavens are the work of your hands.
They will perish, but you remain;
they will all wear out like a garment.
You will roll them up like a robe;
like a garment they will be changed.
But you remain the same,
and your years will never end.”
The quotations in this first chapter of Hebrews take the form of God, the first person of the Trinity, saying something about the Son, the second person of the Trinity. The quotation in this passage comes from Psalm 102:25-27, where the psalmist is proclaiming the eternal, unchanging nature of God, the creator of all that is. But the author of Hebrews understands this to be God the Father, speaking through the psalmist about the Son. The Son, who Hebrews later says took on humanity, lived among us, and died as our atoning sacrifice.
Jesus was not just a good man, teacher, and miracle worker. And He is not just our redeemer and savior. While He is all of that, He is also much more. Jesus is the Son, the second person of the Trinity. He is the creator of the universe. And He is the eternal Son of God. He was in the beginning. And He will be after this creation comes to an end. He has been, and will remain, throughout all of eternity. The Jesus who gave Himself for me on the cross is the eternal God and creator of all that is.