Day 2: Faith, Gratitude, and the Kingdom

Reading: Luke 17

Listen to: Luke chapter 17

Historical Context

Luke 17 is a collection of Jesus’ teachings that, while appearing loosely connected on the surface, form a coherent meditation on four dimensions of kingdom life: responsibility toward others (vv. 1-4), the nature of faith (vv. 5-6), the posture of service (vv. 7-10), the centrality of gratitude (vv. 11-19), and the coming of the Kingdom (vv. 20-37). This chapter sits in the latter portion of Luke’s travel narrative, as Jesus draws closer to Jerusalem and the shadow of the cross grows longer. The teachings become more urgent, more direct, and more concerned with the essential qualities of those who will constitute his community after he is gone.

The chapter opens with a sober warning about causing others to stumble. The Greek skandalon (from which we get “scandal”) refers to a trap or snare – something that causes someone to fall into sin or fall away from faith. Jesus says it would be better to have a millstone (lithos mylikos, the heavy upper stone of a grain mill that required a donkey to turn it) hung around your neck and be thrown into the sea than to cause “one of these little ones” to stumble. The hyperbole underscores the gravity: those who lead others astray face a judgment so severe that drowning would be merciful by comparison. This is followed immediately by the command to forgive – even someone who sins against you seven times in a single day and repents seven times (17:4). The juxtaposition is deliberate: take sin seriously when it threatens others, but extend radical forgiveness when it is directed at you.

The apostles’ response is telling: “Increase our faith!” (17:5). They recognize that the kind of forgiveness Jesus demands is beyond natural human capacity. Jesus’ reply is one of his most famous sayings: “If you have faith as small as a mustard seed, you can say to this mulberry tree, ‘Be uprooted and planted in the sea,’ and it will obey you” (17:6). The sycamine tree (black mulberry) was known for its extraordinarily deep root system, making it virtually impossible to uproot. Jesus is not teaching a technique for performing botanical miracles. He is saying that the issue is never the quantity of faith but its object. Even a tiny amount of genuine faith in a limitlessly powerful God can accomplish what seems impossible. The disciples do not need more faith; they need to trust the God they already believe in.

The parable of the unworthy servants (17:7-10) is often overlooked but profoundly important. A servant who has been plowing all day does not come home to be served dinner; he first serves his master’s dinner and then eats. Jesus’ conclusion is startling: “So you also, when you have done everything you were told to do, should say, ‘We are unworthy servants; we have only done our duty’” (17:10). This cuts against every transactional instinct. We naturally expect that extraordinary obedience earns extraordinary reward. Jesus dismantles this logic: obedience is the baseline, not the bonus. Our relationship with God is not a negotiation; it is a response of grateful service to one who has already given everything.

The healing of the ten lepers (17:11-19) is one of the most poignant narratives in Luke. Jesus is traveling “along the border between Samaria and Galilee” – a detail that prepares us for the ethnic dimension of the story. Leprosy in the first century encompassed a range of skin diseases, all of which rendered a person ritually unclean and socially excluded. Lepers were required to maintain distance from others and to cry out “Unclean! Unclean!” as a warning (Leviticus 13:45-46). These ten lepers stand “at a distance” and cry out for mercy. Jesus tells them to go show themselves to the priests – the procedure prescribed in Leviticus 14 for certification of cleansing. As they go, they are healed. All ten are cleansed. But only one returns.

The detail that this one is a Samaritan is loaded with significance. Samaritans were despised by Jews as ethnic and religious half-breeds, descendants of the intermarriage between Israelites and Assyrian colonists after the fall of the northern kingdom in 722 BC. They worshipped on Mount Gerizim rather than in Jerusalem and accepted only the Pentateuch as Scripture. For a Samaritan to be the only one who returns to praise God is a stinging rebuke to the nine Jewish lepers who did not – and a continuation of Luke’s persistent theme that outsiders often respond to God’s grace more readily than insiders (cf. the Good Samaritan in 10:25-37, the centurion’s faith in 7:9). Jesus’ question hangs in the air: “Were not all ten cleansed? Where are the other nine?” (17:17). The implied answer is devastating: they were too busy enjoying their healing to acknowledge the healer.

The Pharisees’ question about when the Kingdom of God would come (17:20) reflects a common expectation of a dramatic, visible, political event – the overthrow of Rome and the restoration of Israel’s sovereignty. Jesus’ response redirects their attention: “The coming of the kingdom of God is not something that can be observed, nor will people say, ‘Here it is,’ or ‘There it is,’ because the kingdom of God is in your midst” (17:20-21). The Greek entos hymon can mean “within you” (internal, spiritual) or “among you” (already present in Jesus’ person and ministry). Both senses may be intended. The Kingdom is not a future political event to be awaited but a present reality already breaking in through Jesus’ words, healings, and table fellowship with sinners.

Jesus then shifts to the future aspect of the Kingdom – the coming of the Son of Man (17:22-37). Using imagery drawn from the days of Noah and the destruction of Sodom, he warns of a day of sudden judgment that will catch people in the midst of their ordinary routines. The reference to Lot’s wife (17:32) – “Remember Lot’s wife!” – is the shortest verse in Luke’s Gospel and one of the most memorable. She looked back at what she was leaving behind and was turned to a pillar of salt (Genesis 19:26). The message is clear: when the moment of decision comes, there can be no divided loyalties.

Key Themes

• Mustard-Seed Faith – Effective faith is not measured by its size but by its object. A small amount of genuine trust in God accomplishes what human effort cannot.
• Gratitude as Worship – Of ten healed, only one returned to give thanks. Gratitude is not an optional add-on to faith but its essential expression.
• The Kingdom Present and Coming – The Kingdom of God is both already here in Jesus’ ministry and still coming in its fullness. Living between these two realities requires vigilance and readiness.

Connections

• Old Testament Roots: 2 Kings 5:1-14 (Naaman the Syrian leper healed by Elisha – another outsider who finds God’s grace), Leviticus 13-14 (laws governing leprosy and cleansing), Genesis 19:17-26 (Lot’s wife and the destruction of Sodom), Genesis 6-7 (the days of Noah).
• New Testament Echoes: Matthew 17:20 (mustard-seed faith moving mountains), 1 Thessalonians 5:1-3 (the Day of the Lord coming like a thief), Colossians 3:15-17 (gratitude as the foundation of Christian life), Philippians 2:3-4 (considering others before yourself).
• Parallel Passages: Matthew 24:23-28, 37-41 (parallel teaching on the coming of the Son of Man), Mark 9:42 (parallel warning about causing little ones to stumble).

Reflection Questions

1. Jesus says that faith the size of a mustard seed can uproot a deeply rooted tree. What “deeply rooted” obstacle in your life might God be inviting you to trust him with, even if your faith feels small?
2. Why do you think nine of the ten lepers failed to return and give thanks? What does their response reveal about human nature? How do you cultivate gratitude in your own life?
3. Jesus warns against looking back, using Lot’s wife as an example. What are you tempted to “look back” at that prevents you from fully following Jesus forward?

Prayer

Lord Jesus, we confess that we are often among the nine who receive your blessings without returning to give thanks. Forgive our ingratitude. Teach us that even small faith, placed in your infinite power, can accomplish what we think impossible. Keep us from causing others to stumble, and make us quick to forgive those who stumble against us. As we live between your Kingdom already present and your Kingdom yet to come, keep our eyes fixed forward, our hearts undivided, and our lips full of praise. Amen.