1) Jesus heals ten lepers but only one, a Samaritan, returns to thank him.
2) The passage examines how the disciples lacked mercy and calls believers to show compassion and be thankful for God's mercy.
3) It discusses how the Pharisees focused on outward worship over inward mercy and how outcasts like the tax collector were more grateful than the righteous. The passage encourages gratitude in prayer for God's kindness.