Isaiah 41:15
“Behold, I will make thee a new sharp threshing instrument having teeth: thou shalt thresh the mountains, and beat them small, and shalt make the hills as chaff.”
King James Version (KJV)
Read this verse in context with translation switching:
Read Full Chapter →God will transform the weak people into a powerful instrument that breaks down mountains.
Context
God promises to transform Israel from a weak people into a powerful instrument, capable of destroying great obstacles.
What Does Isaiah 41:15 Mean?
From worm to threshing instrument. God is not denying Israel's weakness but promising metamorphosis. A threshing sledge was a wooden platform with flint or iron teeth, dragged across grain to separate chaff from seed. In ancient economies, it was a tool of value and purpose. And this sledge will thresh mountains—the greatest obstacles will be reduced to chaff.
The power is not Israel's own. The instrument does not thresh itself. God makes it sharp, sets it to work. Israel's strength will be God's strength working through them. Mountains represent what seems immovable: empires, sorrows, impossibilities. But in God's hands, even mountains become threshable.
In the Original Language
moreg (threshing instrument)—a wooden board with sharp stones or metal teeth, used to separate grain; here metaphorically applied to Israel's future power.
Application
Your weakness is real. But God sees you not as you are now but as the instrument He is making you into. What seems impossible to change—in yourself, in your world—God can reduce to manageable pieces. Trust the transformation, even when it is not yet visible.