Make a joyful noise to the Lord, all the earth!
Serve the Lord with gladness!
Come into his presence with singing!
Know that the Lord, he is God!
It is he who made us, and we are his;
we are his people, and the sheep of his pasture.
Enter his gates with thanksgiving,
and his courts with praise!
Give thanks to him; bless his name!
For the Lord is good;
his steadfast love endures forever,
and his faithfulness to all generations.
Contrasted with Romans 1:20-22:
For since the creation of the world His invisible attributes, His eternal power and divine nature, have been clearly seen, being understood through what has been made, so that they are without excuse. For even though they knew God, they did not honor Him as God or give thanks, but they became futile in their speculations, and their foolish heart was darkened. Professing themselves to be wise, they became fools. . .
They did not honor Him as God or give thanks. Clearly, honoring God as God leads us naturally into thankfulness. To honor Him as God is to honor His limitless love, His benevolence and care, His provision and uncountable gifts. To fail in thankfulness is to fail to honor God -- and this is the biblical description of fallen and sinful humanity. We are a thankless lot.
Sinners saved by the grace and mercy of God know a thankfulness that exceeds any merely human thankfulness. How do we express thankfulness for the provision the Father has made for us in Christ, the riches that are made ours in Him, the unspeakable gift of the surpassing grace of God? As Paul wrote to the Corinthians, "Thanks be to God for His indescribable gift" [2 Corinthians 9:15].
So, observe a wonderful Thanksgiving -- but realize that a proper Christian Thanksgiving is a deeply theological act that requires an active mind as well as a thankful heart. We need to think deeply, widely, carefully, and faithfully about the countless reasons for our thankfulness to God.