Faith the Size of a Mustard Seed: Reflections on Luke 17:5-10

Published October 05, 2025

"Increase our faith!" The apostles' plea to Jesus in today's Gospel resonates across centuries, echoing in our own hearts when we face life's overwhelming challenges. Their request seems so reasonable, so necessary. Surely more faith would solve our problems, give us confidence, make us better disciples.

Jesus' response, however, redirects our understanding entirely. He doesn't promise them more faith. Instead, He reveals the transformative power already within the faith they possess: "If you have faith the size of a mustard seed, you would say to this mulberry tree, 'Be uprooted and planted in the sea,' and it would obey you."

The Power of Small Faith

A mustard seed is tiny—almost invisible to the naked eye. Yet Jesus uses this smallest of seeds to illustrate something profound about faith. The issue isn't the quantity of our faith but its quality and authenticity. Even the smallest, most genuine faith connects us to the infinite power of God.

We often measure faith by feeling—how confident we feel, how certain we are, how easily prayers seem to be answered. But Jesus suggests that faith isn't about our emotional state or our sense of spiritual strength. It's about trust, even when that trust feels fragile or incomplete.

Humble Service

The second part of today's Gospel shifts to a parable about servants and duty. After working in the fields all day, a servant doesn't expect to be served dinner upon returning home. Instead, he prepares his master's meal first, serving faithfully without expectation of special recognition.

This teaching follows immediately after the lesson on faith, and the connection is crucial. True faith doesn't make us feel entitled to God's favor or special treatment. Rather, it transforms us into grateful servants who recognize that everything we do for God is simply what we owe Him.

Jesus concludes with these striking words: "We are unworthy servants; we have only done what was our duty." This isn't self-deprecation or false humility. It's the recognition that our service to God can never repay what He has already given us.

Faith and Humility United

These two teachings—about mustard seed faith and humble service—work together to reshape our spiritual perspective. Faith gives us access to divine power, but humility keeps us grounded in proper relationship with God. We can move mountains, yet we remain servants. We can accomplish extraordinary things through God's power, yet we take no credit for ourselves.

This paradox lies at the heart of Christian discipleship. The same faith that empowers us also humbles us. The same trust that enables miracles also reminds us of our complete dependence on God's grace.

Living the Gospel Today

In our achievement-oriented culture, Jesus' teaching challenges us profoundly. We're encouraged to celebrate our successes, build our personal brands, and expect recognition for our efforts. But the Gospel calls us to a different way.

When we serve others, volunteer at church, help our neighbors, or practice acts of kindness, we're not earning points with God. We're simply doing what love requires. When God works through us to touch someone's life or solve a problem, the power isn't ours to claim.

Today's Gospel invites us to embrace both the incredible potential and the beautiful humility of faith. We can ask God for the seemingly impossible, trusting that our small faith connects us to His unlimited power. And we can serve faithfully, joyfully, without keeping score or expecting applause.

The apostles wanted more faith. Jesus gave them something better: the understanding that the faith they already possessed was enough to change the world, one act of humble service at a time.