Matthew 13:33
He told them still another parable: “The kingdom of heaven is like leaven that a woman took and mixed into three measures of flour, until all of it was leavened.”
What it says
The kingdom is like leaven hidden in flour until all of it rises.
What it is doing
A small amount changes the whole batch.
In context
33He told them still another parable: “The kingdom of heaven is like leaven that a woman took and mixed into three measures of flour, until all of it was leavened.”