What does Luke 13:21 mean?
What is the meaning of Luke 13:21?

It is like leaven

• Jesus says, “It is like leaven” (Luke 13:21). The comparison is to the unseen, living power of yeast.

• Leaven works quietly yet relentlessly; it cannot be stopped once it starts (Mark 4:26-29).

• The kingdom may appear small, but its influence is alive and active (Luke 17:20-21).


that a woman took

• The woman represents ordinary, everyday believers—people God gladly uses (Acts 2:17-18).

• Her simple act echoes other faithful women who served God within their homes, such as the widow who fed Elijah (1 Kings 17:9-16) and Mary of Bethany who anointed Jesus (John 12:3).

• The kingdom spreads through humble obedience more than through worldly power (1 Corinthians 1:26-29).


and mixed into three measures of flour

• Three measures (about fifty pounds) recall Abraham’s hospitality when Sarah prepared “three measures of fine flour” for the heavenly visitors (Genesis 18:6). Large quantity signals abundance and generosity.

• The leaven is intentionally “mixed” deep within the dough; God plants His word inside hearts (James 1:21).

• Though hidden, the process affects every particle, just as the gospel penetrates every culture (Colossians 1:6).


until all of it was leavened

• The leaven works “until all” is changed—Jesus promises complete, not partial, victory (Philippians 1:6).

• No corner of the dough is untouched; one day “the earth will be filled with the knowledge of the glory of the LORD” (Habakkuk 2:14).

• Evil cannot reverse the work; the kingdom’s advance is certain (Matthew 16:18).


summary

Luke 13:21 assures us that God’s kingdom, though often small and unseen at the outset, is alive with unstoppable power. Like leaven in a massive batch of dough, the gospel in the hands of ordinary believers permeates every sphere of life until the whole creation is transformed.

Why is yeast used as a metaphor in Luke 13:20, and what does it symbolize?
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