It is clear that a sacrifice must consist of praise and thanks, or must at least not be without praise and thanks, if it is to please God. And if it is without praise and thanks, He neither wants nor likes it, as indeed He says (Isaiah 1:11): What is your sacrificing to Me? I do not want your offering of incense. We cannot give God anything; for everything is already His, and all we have comes from Him. We can only give Him praise, thanks, and honor.
Martin Luther, from What Luther Says. Christianity Today, Vol. 34, no. 17.
Link to my RiverWest Radio show on Thanksgiving and Praise: