As you prepare to celebrate Thanksgiving, take some time to read what Billy Graham said about giving thanks.

Thanksgiving—the giving of thanks—to God for all His blessings should be one of the most distinctive marks of the believer in Jesus Christ. We must not allow a spirit of ingratitude to harden our heart and chill our relationship with God and with others.

Nothing turns us into bitter, selfish, dissatisfied people more quickly than an ungrateful heart. And nothing will do more to restore contentment and the joy of our salvation than a true spirit of thankfulness.

In the ancient world, leprosy was a terrible disease. It hopelessly disfigured those who had it, and it permanently cut them off from normal society. Without exception, every leper yearned for one thing: To be healed.

One day 10 lepers approached Jesus outside a village, loudly pleading with Him to heal them. In an instant He restored them all to perfect health—but only one came back and thanked Him. All the rest left without a word of thanks, their minds preoccupied only with themselves, gripped with a spirit of ingratitude.

Today, too, ingratitude and thanklessness are far too common. Children forget to thank their parents for all that they do. Common courtesy is scorned. We take for granted the ways that others help us. Above all, we fail to thank God for His blessings.

Ingratitude is a sin, just as surely as is lying or stealing or immorality or any other sin condemned by the Bible. One of the Bible’s indictments against rebellious humanity is that “although they knew God, they neither glorified him as God nor gave thanks to him” (Romans 1:21, NIV). An ungrateful heart is a heart that is cold toward God and indifferent to His mercy and love. It is a heart that has forgotten how dependent we are on God for everything.

From one end of the Bible to the other, we are commanded to be thankful. In fact, thankfulness is the natural outflowing of a heart that is attuned to God. The psalmist declared, “Sing to the Lord with thanksgiving” (Psalm 147:7, NIV). Paul wrote, “Be thankful” (Colossians 3:15, NIV). A spirit of thanksgiving is always the mark of a joyous Christian.

Why should we be thankful? Because God has blessed us, and we should be thankful for each blessing.

From the Billy Graham Library, we pray you have a blessed Thanksgiving Day.

For more quotes and messages from Billy Graham, visit In His Own Words.