They shall perish; but thou remainest; and they all shall wax old as doth a garment;
They. The earth and the heavens in their present form "shall perish" (Hebrews 12:26-27): not annihilation; as in the case of "the world that ... being over-flowed with water, perished" (2 Peter 3:6). The covenant of the possession of the earth was renewed with Noah and his seed on the renovated earth. So it shall be after the perishing by fire (2 Peter 3:12-13).
Remainest - through х diameneis (G1265)] all changes.
As doth a garment (Isaiah 51:6).