When Jesus healed ten lepers, nine kept going but one stopped and gave thanks to Jesus for what He did.
One of the most important ways to live with happiness and contentment is to stop, look back at what God has given you, and give thanks. The one leper who gave thanks after being healed, understood that it wasn't just about what God gave him, it was more about what God's gifts mean--that He loves and cares about your life.