In Isaiah 40:3–5, we have this prophecy—which was fulfilled in part, at least, by John the Baptist:
The voice of one crying in the wilderness: “Prepare the way of the LORD; make straight in the desert a highway for our God. Every valley shall be exalted and every mountain and hill brought low; the crooked places shall be made straight [a plain] and the rough places smooth; the glory of the LORD shall be revealed….”
I believe that if we want the glory of the Lord revealed, we have to prepare the way of the Lord. And I believe those are the four things we have to do. 1) The valleys have to be raised up. 2) The mountains have to be brought down. Our pride and our arrogance and our self-righteousness have to come down. But our humility will be lifted up. 3) The crooked aspects of our lives have to be made straight. 4) The rough places have to be made smooth.
Then God says: “The glory of the LORD shall be revealed, and all flesh shall see it together; for the mouth of the LORD has spoken.”