Sermon on October 5, 2025, 17th Sunday After Pentecost. Based on Luke 17:5-10.
During this part of the year, the lectionary marches through the Gospel of Luke. I like that. You get a different sense of the Gospels when you read them straight through, rather than picking out a verse or short passage.
Today’s lesson comes after a few hard teachings. A couple of weeks ago, Susan preached about the shrewd manager, which is pretty tricky to interpret. Last week, I preached about poor man Lazarus and the rich man. That’s a difficult teaching about wealth and privilege. The lectionary skips over the next little passage where Jesus tells the disciples that if anyone sins against them, they must forgive—up to seven times a day! Boy, Jesus just doesn’t let up, does he?
In desperation, the disciples cry out to Jesus, “Help us! We can’t do it! Increase our faith!” The Gospel message is hard. For chapter after chapter, Jesus tells his disciples how hard it is to live in this world as if the kingdom of God were already present, and then he demonstrates what happens when you take God’s commands seriously by picking up his cross. Our only hope is that God would give us the strength we need to carry on.
Jesus’s retort is a bit of a challenge to his disciples. A mustard seed is tiny, proverbially small. Maybe it wasn’t actually the smallest seed, but it was used symbolically to represent something unreasonably small. Jesus is almost saying that the disciples have no faith. He is saying that even a tiny bit of faith is enough, so if the disciples are struggling, their faith must be almost unmeasurable.
But wait—these were the people closest to Jesus, the ones who followed him all around Galilee and Judea and the surrounding regions. Surely they had some faith! They left their families, their homes, their jobs, everything for the sake of following the man they thought was the Messiah.
So how are we to understand Jesus’s implicit criticism of his disciples? If the disciples did not even have a mustard seed of faith, what hope do we have?
I’ve probably said this before, but the way we use the word “faith” is perhaps not exactly what is meant by the Greek word in the New Testament. We typically use it to mean an intellectual belief in something that we cannot prove empirically. Like, when we say we have faith in God, we usually mean that we believe that God exists even though we have no tangible evidence. That’s a good Enlightenment way of thinking rationally about the divine and transcendent mystery.
But a better way to think about “faith” in the New Testament is something like “fidelity” or “faithfulness.” It’s less about intellectual assent and more about action. If I say I’m faithful to my wife, I’m not saying that I believe intellectually that we love each other. I’m saying that my actions are consistent with my words of love. In the same way, Christian faithfulness is acting in a way that matches your professed beliefs about God’s Word, Jesus Christ.
Bo McGuffee is an ordained PC(USA) Minister of Word & Sacrament. He writes on Substack about a new way of following God. In a paywalled article titled “Alchemy of Belief,” he wrote:
Personal beliefs are what we actually believe, and they have a direct effect on our behavior. For example, if you believe that political protests make a difference, then you are more likely to attend or support them. If you believe that political protests don’t matter, then you are less likely to attend or support them. So, personal beliefs manifest themselves in our behavior.
Inherited beliefs come from our community, and they function primarily as virtue signals. By saying “I believe” in that which my community believes in, I assert that I belong to the tribe. Sharing inherited beliefs is to share an identity. The problem is that people often don’t realize the difference. They often think that they personally believe certain inherited beliefs when they don’t.
Bo McGuffee, The Alchemy of Belief
Simply put, McGuffee is pointing out the difference between beliefs that we profess and beliefs that impact our behavior. I can say that I believe that Jesus Christ was raised on the third day, but if I don’t live like death has lost its sting, do I really believe it? I can say that I believe in the Holy Spirit, but if I never listen for Her leading, what difference does that belief make in my life?
Too often, we fall back into “functional atheism.” That is, we say that we believe in God, we say that we believe God will make a way, we say that God will provide, but then we live like everything depends on our own will and our own work.
I think that’s what Jesus was getting at. The disciples professed that Jesus was the Messiah, but they didn’t really understand what they were saying. They didn’t truly believe that Jesus had come to conquer sin and death. Instead, they thought that Jesus had come to lead an army to vanquish the Romans, or perhaps that he had come to overturn the Temple hierarchy, and that the disciples were needed to support his revolution and help him rule a re-established nation of Israel.
But Jesus came for a different kind of revolution, one filled with LOVE. Jesus challenged his disciples to trust that His love, God’s love, the Holy Spirit’s love would empower them. They would not have to act on their own. They could trust that God would enable them to change the world.
Trusting in that way is really hard. I mean, really hard. For most of us, it goes against what our experience has taught us. In The Happiness Hypothesis, Jonathan Haidt says that our brain is like a rider on an elephant. The rider is our conscious awareness, the part of our brain that intellectually believes and decides and reasons through decisions. But most of our brain is the elephant. It takes in information and guides our actions. Now, how much influence does a rider really have on an elephant? Mostly, elephants go where they think they should, based on their experiences in the world. The rider can cajole them to go a certain way, or can train them to behave in certain ways, but at the end of the day, the elephant is really in charge.
Usually, when confronted with a problem, our subconscious mind makes a decision, and then our conscious mind figures out why we chose what we chose. Psychologists call this “confabulation,” because the reason we give may have little or nothing to do with the real reason. Maybe the real reason has to do with a habit we’ve developed, or an experience deep in our memory that was triggered by a new situation, or whatever.
My point is that our real beliefs live in the elephant, not the rider. That’s why we can say we believe certain things, but our actions have no relation to those beliefs. We may say that all people are equal in God’s eyes, but then we make snap decisions and exclude someone based on the way they look or talk or act. We may say we believe that God will provide, but then anxiously check how the stock market is performing.
So what can we do? We need to train the elephant. If you want your actions to match your beliefs, you need to embed those beliefs down in your subconscious. Let me tell you about what I’ve been doing for the last couple of months.
I read a book called Miracle Morning. In it, the author describes a set of practices that he does each morning so that his day goes well. The acronym he uses is SAVERS: silence, affirmations, visualization, exercise, reading, scribing. For silence, I pray. Scribing is a word for journaling that makes the acronym work.
I want to focus on affirmations and visualization. These are not things like saying, “I am rich,” or “I will be famous.” These are ways of setting an intention for how you will live your life. By repeating the same words that commit yourself to a certain path, and then visualizing where that path will lead, you slowly train your subconscious to make choices that lead where you want your life to go.
One of my current affirmations is this: “I am committed to becoming strong and fit and to losing weight, no matter what. There is no other option.” I say a few other things to flesh that out, and then I visualize myself hiking confidently up the mountain with my 70-pound pack on as I head to spike camp, or with a hindquarter of elk in my pack. In this way, I increase the probability that I will choose to be active and to eat right.
My other current affirmation is this: “I am committed to starting an LGBTQ ministry in Rolla, no matter what. There is no other option. This is how God has called me to serve Their kingdom. Now is the right time: all of the conditions are right.” After I say a few other things, I visualize the LGBTQ+ Rolla Community Center filled with faithful people talking about how God is moving in their lives.
Now, am I certain that this will be successful? No. But I am training myself to keep this goal in focus and to make the choices that are more likely to lead to its success. The reason I can commit to this path is that I believe God will amplify my efforts. I know that alone, I can do little more than plant seeds, but that God will give the growth.
This is faith like a mustard seed. A lifetime of experiences has demonstrated that nothing succeeds without my planning and execution, but I know that God has called me to this ministry, so I know that God will give me what I need to succeed. I can read the Bible and see examples of God giving the growth. Anxiety can kill my initiative, but through prayer, affirmation, and visualization, God will give me the courage to act.
There is only one way to ensure failure, and that is to not even try. With God’s help, anything is possible. What is God calling you to do? May God bless you with a vision of how you can contribute to the flourishing of Their kingdom, wisdom to see the path, and courage to put your faith into action. Amen.
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