What is giving thanks?
—it’s a response to someone who gave things to you. And the things given were not earned. (For example, our paycheck is something you shouldn’t give thanks for because you worked for it).
—the response is vocalized which should be accompanied by a particular disposition toward the person who gave to you.
—the response of thanksgiving does not require that the person who gave to you be superior to you. Most certainly God is worthy of our thanksgivings everyday but other people who have given to you ought to receive a thankful response too.
—thankfulness requires that you notice these things. You must be aware of what you have been given was undeserved.
—because to be generous here, we can possibly forget. An opposite response to someone who gave is to forget the response of thanksgiving. This could be due to not stopping to think about what has occurred or there’s just too much going on in life therefore you did not remember the kind deeds done to you.
—while forgetfulness is a possibility for not being thankful, more often than not it is out of pride. We think we deserve everything and the world ought to take notice. They ought to be thankful for the opportunity to give to me kind of attitude. On a more subtle note of pride, we might abhor the gift and in doing so we abhor the giver. Now, we will likely respond with the words of thanksgiving but they are just words. The gift isn’t what I wanted or needed and we think there’s no benefit from it.
—though we could breakdown piece by piece the steps from pride to unbelief I don’t think that’s necessary. The major problem with not having a heart of thankfulness is unbelief in God. This is the root of unthankfulness. Because if we trust in the Lord, we of all people know and understand that God has been gracious and merciful to us in every respect throughout our entire life. When we turn our attention on the fact that we deserve the consequences of our sin—the miseries of this life and eternal death itself. But Christ Jesus came into the world to save sinners like us. He took the death that we deserved and we get forgiveness and counted righteous by faith in him. To all who have turned from their sins and trusted in Jesus, we will be saved. From that understanding, we of all people ought to be thankful!
The Word Is Not Imprisoned 