10 And: “You, Lord, in the beginning laid the foundation of the earth, and the heavens are the work of Your hands.
11 They will perish, but You remain; and they will all grow old like a garment;
12 Like a cloak You will fold them up, and they will be changed. But You are the same, and Your years will not fail.”
The quote is from Psalm 102:25-27. In Psalm 102, the Son cries out in His humanity. The Father responds with the verses quoted here about His deity. They show Christ as Creator, eternal, unchangeable. In Psalm 102:24-25, the Son asked the Father not to shorten His days. In verse 28 (and Hebrew 1:12), the Father assures Him that His days will never end. This was also assurance for believing Jews who saw their Messiah rejected and killed.
In verses 23 and 24 of that Psalm [Psalm 102], the Son is heard addressing the Father in view of the cross. He cries, “He weakened My strength in the way; He shortened My days. I said, O My God, take Me not away in the midst of My days: Thy years are throughout all generations.” The verses that follow might seem at first glance to be a continuation of His plea, but with the light that this divinely inspired commentary throws upon them, we see that they are the answer of the Father to the Son. God replies to the Sufferer of Calvary: “Of old has Thou laid the foundation of the earth: and the heavens are the work of Thy hands. They shall perish but Thou shalt endure: yea, all of them shall wax old like a garment; as a vesture shalt Thou change them, and they shall be changed. But Thou art the same, and Thy years shall have no end. — Studies in the Epistle to the Hebrews, by H.A. Ironside, pages 36-37.
and (at the start of verse 10) — continues the thought begun in verse 4 and continued through verses 5-9.
they (v.11) — the heavens
remain (v.11) = remain permanently
old (v.11) — not indicating old in time, but worn out
garment (v.11) = that which is thrown around — a wrap, a garment that one wraps around his body
fold (v.12) = roll up
fail (v.12) = end, leave off
Verse 7 showed that angels are created. These verses show the Son and the Creator and, therefore, superior.