For the invisible things of Him from the creation of the world are clearly seen, being understood by the things that are made, even His eternal power and Godhead; so that they are without excuse: because that, when they knew God, they glorified Him not as God, neither were thankful… – Romans 1:20, 21

Unthankfulness is a sin for which there is no excuse if it be attended with knowledge. I tremble both for myself and you when I see want of thankfulness thus set in the front rank of sins.

There is in some a want of gratitude for mercies possessed. They receive many blessings without making a note of them, or even seeming to know that they have them. The Lord continues to bless them in things temporal, to keep them in health and strength, ay, and to give them the means of grace and spiritual opportunities; and they live as if these things were so commonplace that they were not worth thanking God for. Many professors are of that kind, recipients of countless mercies, but destitute of such common thankfulness as even beast might manifest. From them God hears no song of gratitude, no chirp of praise, though birds would charm the woodlands with their minstrelsy: these are worse than the dumb driven cattle, or the fishes in the brook, which do at least leap up, and mean their Maker’s praise.

God deliver us from such a state of heart as that; and may we never, in any of these senses, be found amongst those professors, of whom it is said that, when they knew God, they glorified Him not as God, neither were they thankful. ~ C.H. Spurgeon

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