To us, the physical seems so solid, indestructible, and permanent, at least in terms of our own brief existence. But Hebrews tells us to get our attention off the immediate, the "around and about," the physical. We are to reorient our lives, our thinking, our focus, toward the eternality of Christ's dominion.
A profound reality of God and His Word is that they are changeless. "You remain," Hebrews 1:11 says, but we grow old and die. The eternal values never change, and even more exciting, they can be taken through the grave.
What is important in our lives? The immediate gratifications offered by this world? The things we possess? The accomplishments we achieve? If so, we will not likely see God very frequently. Or, we can ask, what in our lives demands our time, effort, and thought? An objective answer to this may reveal what we really worship.
We cannot identify with or worship anything transient. Something must "remain" or "continue" (ASV), as verses 10-12 tell us. Something eternal must abide; something unchanging must continue. To this we can cling, and within it, we can live our life by faith.