Praise ye the LORD. Sing unto the LORD a new song, and His praise in the congregation of saints. – Psalm 149:1

Solid joys and lasting pleasures make up the new song of the Christian. New mercies make the song always new. There is a freshness in it of which we never weary. Some of you have heard the gospel now for fifty years: has it got flat to you? The name of Jesus Christ was known to you as the most precious of all sounds fifty or sixty years ago: has it become stale now? Those of us who have known and loved Him twenty years can only say, “The more we know Him the more sweet He is, and the more we enjoy His gospel the more resolved we are to keep to the old-fashioned gospel as long as ever we live.” We could, indeed, sing a new song, though we have sung the self-same praises these twenty years. All the saints’ praises have this about them-that they are all harmonious. I do not say that their voices are. Here and there, there is a brother who sings very earnestly through his nose, and very often puts out the rest that are round about him; but it does not matter about the sound of the voice to the ear of man: it is the sound of the heart to the ear of God. If you were in a forest, and there were fifty sorts of birds, and they were all singing at once, you would not notice any discord. The little songsters seem to pitch their songs in keys very different from each other, but yet, somehow or other, all are in harmony. Now the saints, when they pray-it is very strange-they all pray in harmony. So also when they praise God. I have frequently attended prayer-meetings where there were brethren of all sorts of Christian denominations, and I would have defied the angel Gabriel to have told what they were when they were on their knees. So is it with praise. I may say, “The saints in praise appear as one:-

“In word, and deed, and mind,
While with the Father and the Son,
Sweet fellowship they find.”

~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3476.cfm