6 As ye have therefore received Christ Jesus the Lord, so walk ye in him:
7 Rooted and built up in him, and stablished in the faith, as ye have been taught, abounding therein with thanksgiving.
Our Father in Heaven ordained thanksgiving as a way of life for us, our loving response to Him for sending His Son to save us, and for His daily love and care for us.
1 Thessalonians 5:18
In every thing give thanks: for this is the will of God in Christ Jesus concerning you.
22 And let them sacrifice the sacrifices of thanksgiving, and declare his works with rejoicing.
15 By him therefore let us offer the sacrifice of praise to God continually, that is, the fruit of our lips giving thanks to his name.
Ideally, Thanksgiving Day should be a day that is larger-than-life, full of fellowship and happy and good things. However, it is often a day on which people suffer more from their grief and needs, because it is supposed to be a happy day so they feel their pain more sharply.
May the Father lead us to help people who must thank Him through their tears and in the midst of loss and enormous need; and to help them to remember His eternal love for us in Jesus Christ, Who became poor for our sake, suffered for us, and is near to the broken-hearted!
9 In all their affliction he was afflicted, and the angel of his presence saved them: in his love and in his pity he redeemed them; and he bare them, and carried them all the days of old.