The sermon centers on the transformative power of gratitude as a hallmark of true faith, rooted in the biblical command to give thanks in all circumstances—a will of God revealed through Paul's exhortation in 1 Thessalonians 5:16–18 and exemplified in the life of Christ. It draws profound parallels from history, including the Pilgrims' landing at Cape Cod and Lincoln's wartime Thanksgiving proclamation, to underscore that thankfulness is not a reaction to favorable conditions but a posture of trust in God's sovereign providence. The narrative of the ten lepers in Luke 17 highlights the shocking reversal of expectation: the one who returns in gratitude is a Samaritan, a despised outsider, while the nine Israelites—religious insiders—fail to acknowledge their healing. This story reveals that genuine thanksgiving arises not from religious pedigree but from a heart humbled by mercy, recognizing that only Jesus, the true priest and sacrifice, can cleanse the soul. The sermon culminates in the ultimate Thanksgiving—the Lord's Supper—where Christ, betrayed and crucified, gives thanks, demonstrating that our deepest gratitude is not for blessings, but for salvation, forgiveness, and the grace that transforms us from grief to gratitude.