Ascribe ye strength unto God: His excellency is over Israel, and His strength is in the clouds. – Psalm 68:34

“Ascribe ye strength unto God: His excellency is over Israel, and His strength is in the clouds.” This was the royal token given by Daniel, the Prophet, in his seventh chapter, at the 13th verse, “I saw in the night visions and, behold, one like the Son of Man came with the clouds of Heaven.” The clouds are meant to set forth the might, as well as the majesty, of His coming. Not less than Divine is the Glory of the Son of God who once had not where to lay His head! The most sublime objects in nature shall most fitly minister to the manifest Glory of the returning King of men! “Behold, He comes,” not with the swaddling bands of His Infancy, the weariness of His Manhood, the shame of His death, but with all the glorious tapestry of Heaven’s high chambers!

The clouds denote the terror of His coming to the ungodly. His saints shall be caught up together with Him in the clouds, to meet the Lord in the air. But to those that shall remain on earth, the clouds shall turn to their blackness and horror of darkness. Then shall the impenitent behold this dread vision—the Son of Man coming in the clouds of Heaven. The clouds shall fill them with dread and the dread shall be abundantly justified, for those clouds are big with vengeance and shall burst in judgment on their heads! …Think clearly for a moment, until the meaning becomes real to you. Jesus Christ is coming, coming in unknown splendor! When He comes, He will be enthroned far above the attacks of His enemies, the persecutions of the godless and the sneers of skeptics. He is coming in the clouds of Heaven, and we shall be among the witnesses of His appearing! Let us dwell upon this Truth of God! ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1989.cfm