Matthew 17:20 • Luke 17:6
I. Opening Focus: What Did Jesus Actually Mean?
Key idea: Jesus was not talking about small faith but true, living, rooted faith.
Scriptures:
- Matthew 17:20
- And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.
- Luke 17:6
- And 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.
Teaching Point:
The disciples didn’t fail because their faith was too small.
They failed because their faith was misplaced—not anchored in God’s power in that moment.
Discussion Question:
- When have you felt like you “believed,” but your faith wasn’t actually rooted in God?
II. Understanding the Mustard Seed
A. Small but Alive
A mustard seed is tiny, but it contains life, design, and certainty.
B. Small but Growing
It becomes a tree large enough for birds to rest in (Matthew 13:31–32).
C. Small but Persistent
It pushes through soil, darkness, and resistance.
Teaching Point:
Jesus is describing the nature of faith, not the size of it.
Discussion Question:
- What is the difference between “feelings” and “living faith”?
III. The Disciples’ Problem: Unbelief, Not Size
A. They had faith—but not in the right place
They trusted:
- their past success
- their own authority
- their own ability
B. Jesus exposes the root issue
“Because of your unbelief…” (Matthew 17:20)
C. True faith is not self‑confidence
It is God‑confidence.
Teaching Point:
Even the smallest faith—if it is truly anchored in Christ—has divine power.
Discussion Question:
- What are common ways believers accidentally put faith in themselves instead of God?
IV. Why Jesus Mentions Mountains and Sycamine Trees
A. Mountains (Matthew 17:20)
Symbolize:
- obstacles
- impossibilities
- kingdoms
- deeply rooted problems
Meaning:
God can do what no human can do.
B. Sycamine Tree (Luke 17:6)
Known for:
- deep roots
- bitter fruit
- long lifespan
Symbolizes:
- generational patterns
- bitterness
- long-standing spiritual issues
Meaning:
True faith can uproot what has been rooted for generations.
Discussion Question:
- Which image speaks more to you right now—the mountain or the sycamine tree?
V. What Mustard Seed Faith Actually Looks Like
1. Living
Not theoretical. It responds, trusts, obeys.
2. Planted
A seed does nothing until it is placed in the soil.
Faith does nothing until it is placed in God.
3. Growing
It matures and becomes shelter for others.
4. Persistent
It pushes through fear, doubt, and circumstances.
5. Rooted in God’s power, not ours
The source of faith’s power is God, not the believer.
Teaching Point:
Faith doesn’t have to be big—it has to be real.
VI. Practical Application: Planting Mustard Seed Faith
A. Identify where your faith is planted
Is it in:
- your ability
- your emotions
- your past
- your fears
- or God?
B. Practice small acts of obedience
Mustard seed faith grows through:
- prayer
- surrender
- obedience
- Scripture
- repentance
- worship
C. Speak to the “mountains” and “trees”
Not with magic words, but with trust in God’s character.
D. Expect growth, not instant results
Seeds grow quietly, steadily, faithfully.
Discussion Question:
- What is one “seed-sized” act of faith you can plant this week?
VII. Closing Summary
Mustard seed faith is not big faith—it is true faith.
It is small but alive, planted in God, growing, and persistent.
And because it is rooted in Him, even the smallest measure of it can move what looks immovable and uproot what seems permanent.

