This sermon examines the healing of ten lepers in Luke 17 to distinguish between superficial faith and genuine conversion. The preacher contrasts the nine men who received physical healing but failed to return with gratitude against one Samaritan who worshipped Jesus out of profound thankfulness. The central argument asserts that true believers are characterized by a selfless desire to glorify God rather than merely seeking temporal benefits. The text highlights that common grace extends even to the ungrateful, while saving faith inevitably produces adoration and humility toward Christ. The message concludes with an exhortation for listeners to cultivate a heart of consistent worship and gratitude for God's mercies.