Because that, when they knew God, they glorified Him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened. – Romans 1:21

They knew God, but they glorified Him not as God, neither were they thankful. And the result of it was that they fell into vain imaginings. If we do not glorify God, the true God, we shall soon be found setting up another god. This vain-imagination business is being done quite as extensively now as in Paul’s days. Depart from the inspiration of the Bible, and from the infallibility of the Spirit of God who wrote it, and where will you go? Well I cannot tell you where you will go. One wanders into one vain imagination, and one into another, till the dreamers are on all sides. Our thinkers have introduced an age of inventions, wherein everything is thought of but the truth of God. We do not want these novelties. We are satisfied with the word of God as we find it. But if we do not glorify God as God, and are not thankful to Him for all His teachings, then away you go into vain imaginations.

A heart that cannot feed at God’s table will riot somewhere. He that is not satisfied with the cup that God has filled will soon be a partaker of the cup of devils. An unthankful spirit is, at bottom, an atheistic spirit. If God were God to us, we should not be unthankful to Him. If God were glorified in our hearts, and we were thankful for everything that He did, we should walk in holiness, and live in submission. And if we do not thus behave ourselves, the tendency will be for us to go from bad to worse, and from worse to very worst. May the Lord tether us fast to Himself, and even nail us to the cross. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1763.cfm