Sing, O ye heavens; for the LORD hath done it…break forth into singing, ye mountains, O forest, and every tree therein: for the LORD hath redeemed Jacob, and glorified Himself in Israel. – Isaiah 44:23

Mr. Sankey is now behind me, but he cannot sing sweetly enough to set forth to the full the majesty of this song, nor could the choicest choir of singing men and singing women; nay, this task exceeds the reach of the seraphim themselves. Praise is silenced, O Lord, by the glory of Thy love. Yet, brethren, let us give forth such music as we have.

Let us consider how we sing this song. We sing it when by faith we see the grand truth that Jesus Christ took His people’s sin upon Him, and so redeemed them. Understanding this fact, which is the heart of the gospel, we begin to sing for joy. Get a grip of that, my brethren, and hold it fast: your hearts will then sing; you cannot help it. Not all the harps of heaven can be more melodious than your song will be when your heart fully understands this fact-that Jesus Christ did actually stand in His people’s stead, and finished transgression, and brought in everlasting righteousness for them. You will sing it better still if the Holy Spirit has applied it to your own soul, so that you can say, “My sins are blotted out like a cloud, and like a thick cloud my transgressions.” “Through Jesus’ blood I am clean, I am accepted in the Beloved, I am dear to the heart of God; on me there remaineth now no spot nor wrinkle, for I am cleansed through Jesus Christ.” Nothing else can bring forth such charming music from any man’s mind as a sense of redeeming grace and dying love. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1240.cfm