Homily for the 28th Sunday of the Year

Everyone has heard of the story of the Jesus Curing the Ten Lepers and of the One Leper who returned to give thanks. What, however, do we make of the other nine who did not return to Jesus. Are they ungrateful for the grace of God's cure, or were they obedient to the command of Jesus? Why, exactly, did the one return to Jesus and give thanks? What kind of example do all Ten Lepers give us?