Albert Barnes Commentary Hebrews 1:12

"And as a mantle shalt thou roll them up, As a garment, and they shall be changed: But thou art the same, And thy years shall not fail." — Hebrews 1:12 (ASV)

And as vesture, a garment—literally something thrown around—peribolaion—and properly denoting the outer garment, the cloak or mantle. See the notes on Matthew 5:40.

Shalt thou fold them up. That is, the heavens. They are represented in the Scriptures as an expanse, or something spread out (Genesis 1:7, referring to the Hebrew text), and a curtain or tent (Isaiah 40:22), and as a scroll that might be spread out or rolled up like a book or volume (Isaiah 34:4; Revelation 6:14). Here they are represented as a garment or mantle that might be folded up—language borrowed from folding up and laying aside garments that are no longer fit for use.

And they shall be changed. That is, they will be exchanged for others, or they will give place to the new heavens and the new earth (2 Peter 3:13). The meaning is that the present form of the heavens and the earth is not to be permanent but is to be succeeded by others, or to pass away, but the Creator is to remain the same.

Thou art the same. You will not change.

And thy years shall not fail. You will exist forever unchanged. What could more clearly prove that he of whom this is spoken is immutable? Yet it is indubitably spoken of the Messiah and must demonstrate that he is divine. These attributes cannot be conferred on a creature, and nothing can be clearer than that he who penned the epistle believed that the Son of God was divine.