15 One of them, when he realized that he was healed, turned around and came back, shouting his gratitude, glorifying God. 16 He kneeled at Jesus' feet, so grateful. He couldn't thank him enough - and he was a Samaritan. 17 Jesus said, "Were not ten healed? Where are the nine? 18 Can none be found to come back and give glory to God except this outsider?" 19 Then he said to him, "Get up. On your way. Your faith has healed and saved you."
Matthew Henry's Commentary on Luke 17:15-19
Commentary on Luke 17:11-19
(Read Luke 17:11-19)
A sense of our spiritual leprosy should make us very humble whenever we draw near to Christ. It is enough to refer ourselves to the compassions of Christ, for they fail not. We may look for God to meet us with mercy, when we are found in the way of obedience. Only one of those who were healed returned to give thanks. It becomes us, like him, to be very humble in thanksgivings, as well as in prayers. Christ noticed the one who thus distinguished himself, he was a Samaritan. The others only got the outward cure, he alone got the spiritual blessing.