"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." (Hebrews 13:15) David said, "Accept, I beseech thee, the freewill offerings of my mouth, O LORD." (Psalm 119:108) In Psalms 34:1 he said, “I will bless the Lord at all times. His praise shall continually be in my mouth.”
Thanksgiving is more than just getting together with family and friends. Thanksgiving is the expressing of worship to God. It is more than just naming a few of our blessings. It is coming before the Kings of Kings and humbly thanking Him for who He is. We give to Him the sacrifices of thanksgiving because He first gave those blessings to us.
The Lord says that the giving of thanks is very significant. It is His will for us to give thanks. "In every thing give thanks: for this is the will of God in Christ Jesus concerning you." (1 Thessalonians 5:18)
The giving of thanks blesses God, encourages the believer, and is a witness to the lost.
Thankfulness reminds us that God is sovereign and in control. Thankfulness helps us to stay focused on the Lord and not to be distracted by our circumstances. Thankfulness reminds us that we belong to our Creator and Redeemer. Thankfulness will cause us to review our spiritual and material blessings.