Throughout the Bible, we hear of the voice of the Lord is powerful- that when God speaks, all of creation is subject to His will. Psalm 29 focuses on this power and majesty of the voice of the Lord- it breaks the cedars, it flashes forth fire, it shakes the wilderness. The author in Hebrews points to this and says that God’s voice will “shake” or “consume” that which is temporary, so that what is permanent (“unshakeable”) will remain. We are reminded to stay sensitive to that voice, and to focus our worship on that which is truly worthy, rather than that which will be burned away. None will be more worthy than the center of this unshakeable kingdom, God Himself.