Gratitude positively affects one's emotions and actions. Being thankful generally increases positive emotions such as happiness and lessens negative emotions such as vainness. In Romans 1:21, the apostle Paul wrote that those who did not share gratitude towards God became vain and deluded; in other words, ingratitude makes for negative feelings. The act of being grateful builds positive feelings, such as that in Luke 17:11-19, where written is the Samaritan giving thanks to Jesus for curing his leprosy. In short, out of the ten healed leprous men, only the Samaritan had the decency to thank Jesus with utter gratitude for His merciful act. Because of his devout gratefulness, the Samaritan not only expressed his thanks by prostrating before Jesus,
