Let the word of Christ dwell in you richly as you teach and admonish one another with all wisdom, as you sing psalms, hymns and spiritual songs with gratitude in your hearts to God. And whatever you do, whether in word or deed, do it all in the name of our Lord Jesus Christ, giving thanks to God the father through him. In our worship of God and with each other, we are to be thankful. In our service to God whether in word or in deed, we are to be thankful. Do it all with thankfulness and gratitude in our hearts to God.
Thankfulness is to be the background of the Christian life.
In fact, look one more time at these lepers. But nine of them were satisfied with a mere miracle. They got their miracle but that was all they got. Your faith has made you well. Now he was already healed.