📖 Biblical Definition
"If you have faith as a grain of mustard seed, you will say to this mountain, 'Move from here to there,' and it will move, and nothing will be impossible for you" (Matt 17:20). The theology is not "bigger faith, bigger results" but "any real faith in a big enough God accomplishes impossibilities." The size of the seed is irrelevant compared to the object of the faith. A mustard seed in God has more weight than a mountain of self-confidence. Jesus' disciples had asked why they couldn't cast out a particular demon; His answer was not "try harder" but "even tiny real faith, directed at the true God, would have been enough."
📜 Webster 1828 Definition
MUS'TARD-SEED FAITH, n.
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MUS'TARD-SEED FAITH. A phrase derived from the Lord's teaching that even the smallest quantity of genuine faith, directed at the true God, is sufficient to move mountains. The teaching is not that the believer must grow bigger faith but that the smallest real faith has infinite leverage because of the Object in which it rests. The mountain-mover is not the size of the seed but the strength of the ground it is planted in.
📖 Key Scripture
Matthew 17:20 — "He said to them, "Because of your little faith. For truly, I say to you, if you have faith like a grain of mustard seed, you will say to this mountain, 'Move from here to there,' and it will move, and nothing will be impossible for you.""
Luke 17:6 — "If you had faith like a grain of mustard seed, you could say to this mulberry tree, 'Be uprooted and planted in the sea,' and it would obey you."
Mark 9:24 — "Immediately the father of the child cried out and said, "I believe; help my unbelief!""
Matthew 13:31-32 — "The kingdom of heaven is like a grain of mustard seed that a man took and sowed in his field. It is the smallest of all seeds, but when it has grown it is larger than all the garden plants."
⚠️ Modern Corruption
Prosperity-gospel readings distort mustard-seed faith into "believe harder, get more." Jesus was saying the opposite.
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Word-of-faith teaching often cites the mustard-seed passage as leverage to manifest wealth or healing through intensity of belief. Jesus' point was the opposite: it is not about the size of your belief but the reality of it and the power of the God it rests in. The mustard seed is tiny; it moves mountains only because God is infinite. The father in Mark 9:24 — "I believe; help my unbelief!" — is a mustard-seed faith that Christ honors and answers. Bring your tiny faith to the God who moves mountains.
🔗 Greek & Hebrew Roots
G4615 — sinapi — mustard seed. G4102 — pistis — faith.
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G4615 — sinapi (σίναπι) — mustard; the smallest seed of Palestinian agriculture.
G4102 — pistis (πίστις) — faith, trust, confidence.
Usage
"Mustard-seed faith moves mountains not by size but by the God it is planted in."
"I believe; help my unbelief. That is the prayer of every honest mustard-seed Christian."