The Apostle Paul when speaking of his ministry and the afflictions and trials that accompanied it said,
"For it is all for your sake, so that as grace extends to more and more people it may increase thanksgiving, to the glory of God." 2 Corinthians 4:15
My heart is most filled with thankfulness when it is bowed low with the understanding of the wretchedness of my sin and the extreme mercy of the Cross. That He loved me and saved me is the most humbling gift for which I am filled with eternal thanksgiving.
May your Thanksgiving Day be filled with much rejoicing!