New Testament · Gospel

Luke 17

Faith Like a Mustard Seed

Ten lepers are cleansed, but only one returns to say thank you — and he's the outsider. Jesus teaches that the kingdom comes without warning.

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1Then said he unto the disciples, It is impossible but that offences will come: but woe unto him, through whom they come!

2It were better for him that a millstone were hanged about his neck, and he cast into the sea, than that he should offend one of these little ones.

3Take heed to yourselves: If thy brother trespass against thee, rebuke him; and if he repent, forgive him.

4And if he trespass against thee seven times in a day, and seven times in a day turn again to thee, saying, I repent; thou shalt forgive him.

5And the apostles said unto the Lord, Increase our faith.

6And the Lord said, If ye had faith as a grain of mustard seed, ye might say unto this sycamine tree, Be thou plucked up by the root, and be thou planted in the sea; and it should obey you.

7But which of you, having a servant plowing or feeding cattle, will say unto him by and by, when he is come from the field, Go and sit down to meat?

8And will not rather say unto him, Make ready wherewith I may sup, and gird thyself, and serve me, till I have eaten and drunken; and afterward thou shalt eat and drink?

9Doth he thank that servant because he did the things that were commanded him? I trow not.

10So likewise ye, when ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do.

11And it came to pass, as he went to Jerusalem, that he passed through the midst of Samaria and Galilee.

12And as he entered into a certain village, there met him ten men that were lepers, which stood afar off:

13And they lifted up their voices, and said, Jesus, Master, have mercy on us.

14And when he saw them, he said unto them, Go shew yourselves unto the priests. And it came to pass, that, as they went, they were cleansed.

15And one of them, when he saw that he was healed, turned back, and with a loud voice glorified God,

16And fell down on his face at his feet, giving him thanks: and he was a Samaritan.

17And Jesus answering said, Were there not ten cleansed? but where are the nine?

18There are not found that returned to give glory to God, save this stranger.

19And he said unto him, Arise, go thy way: thy faith hath made thee whole.

20And when he was demanded of the Pharisees, when the kingdom of God should come, he answered them and said, The kingdom of God cometh not with observation:

21Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you.

22And he said unto the disciples, The days will come, when ye shall desire to see one of the days of the Son of man, and ye shall not see it.

23And they shall say to you, See here; or, see there: go not after them, nor follow them.

24For as the lightning, that lighteneth out of the one part under heaven, shineth unto the other part under heaven; so shall also the Son of man be in his day.

25But first must he suffer many things, and be rejected of this generation.

26And as it was in the days of Noe, so shall it be also in the days of the Son of man.

27They did eat, they drank, they married wives, they were given in marriage, until the day that Noe entered into the ark, and the flood came, and destroyed them all.

28Likewise also as it was in the days of Lot; they did eat, they drank, they bought, they sold, they planted, they builded;

29But the same day that Lot went out of Sodom it rained fire and brimstone from heaven, and destroyed them all.

30Even thus shall it be in the day when the Son of man is revealed.

31In that day, he which shall be upon the housetop, and his stuff in the house, let him not come down to take it away: and he that is in the field, let him likewise not return back.

32Remember Lot’s wife.

33Whosoever shall seek to save his life shall lose it; and whosoever shall lose his life shall preserve it.

34I tell you, in that night there shall be two men in one bed; the one shall be taken, and the other shall be left.

35Two women shall be grinding together; the one shall be taken, and the other left.

36Two men shall be in the field; the one shall be taken, and the other left.

37And they answered and said unto him, Where, Lord? And he said unto them, Wheresoever the body is, thither will the eagles be gathered together.

Understand This

Luke 17, explained

What Luke 17 is saying

Jesus teaches on causing others to stumble, the necessity of unlimited forgiveness, and the nature of faith—even faith as small as a mustard seed can accomplish the extraordinary. The parable of the unworthy servants reframes discipleship as duty rather than merit. Ten lepers are healed, but only one—a Samaritan—returns to give thanks, prompting Jesus' observation about faith and gratitude. The chapter concludes with eschatological teaching on the coming of the kingdom.

The background behind it

Lepers were required by Levitical law to show themselves to priests for certification of cleansing (Lev 14). That the grateful leper is a Samaritan continues Luke's persistent theme of outsiders exemplifying true faith. The eschatological discourse draws on apocalyptic imagery common in Second Temple Judaism, with allusions to the days of Noah and Lot as typological warnings.

Themes running underneath

The distinction between the nine Jewish lepers and the one grateful Samaritan reinforces Luke's theology that ethnic or religious identity does not guarantee spiritual responsiveness. The 'unworthy servants' parable counters any theology of merit—obedience is the baseline expectation, not grounds for divine compensation. The kingdom's coming is described as both present reality and sudden future irruption.

Why it still matters

Gratitude emerges as the distinguishing mark of genuine faith—nine were healed, but only one was made whole through thanksgiving. The eschatological warnings counsel against both complacency and speculation, calling for faithful presence in ordinary life.

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Scripture text: King James Version — public domain.