Luke 17:15

And one of them, when he saw that he was healed
&c.] When he felt perfect soundness in his body, and perceived that he was restored to his health, and saw with his eyes that the leprosy was gone from him, which must be visible enough:

turned back;
either immediately, before he went to the priests; or afterwards, came back to Jesus, when he bad been with them:

and with a loud voice glorified God;
Jesus Christ, who is truly God, and whose proper divinity might be seen in this miracle; see ( 2 Kings 5:7 ) or God the Father, through Christ, and for his sake, by ascribing his cure to his power, and by returning thanks for it, and acknowledging with gratitude, Christ to be the author of it; which he did, with as loud a voice, as he cried to him for mercy; that all might know the miracle that was wrought, and join in giving glory to Christ: and it was but one of them that did so; gratitude is a rare thing, it is found but in few; unthankfulness cleaves to most persons; it is the general character of men to be unthankful and unholy; multitudes, even all men, share in the providential goodness of God, yet few take notice of, and are thankful for it; God is therefore said to be good, to the unthankful and to the evil, ( Luke 6:35 ) . Few there are who are of Jacob's spirit, that judge themselves unworthy of the least of mercies, and are heartily thankful for every favour: and this the leper did, when he was sensible that he was healed; no man will seek after a cure, till he sees, or is sensible of his sickness and his wound; and when he does, he will inquire after, and make use of the proper means of healing; and when he has got a cure, he is, or at least ought to be, thankful for it: and so it is in spiritual things, the whole need not a physician, or see no need of the physician, Christ; but those who are sick, and sensible of the sickness of sin, do; and when they perceive that their diseases are healed, and their sins forgiven, then they call upon their souls, and all within them, to bless the Lord, who has done this for them: and it becomes such who are cured of the leprosy of sin, to glorify God; not only with their mouths, by bringing their offering and sacrifice of praise to him, as the leper by the law was obliged to bring his offering, at the time of his cleansing; but by deeds also, with their bodies, and with their spirits; by a holy, humble, and spiritual conversation before men, signified by the leper's washing himself, and clothes, and shaving off all his hair; and by attending on the word and ordinances, by a professed subjection to the Gospel of Christ, signified by the blood being put upon the tip of the right ear of the leper, and on the thumb of his right hand, and on the great toe of his right foot, ( Leviticus 14:14 ) .