The Leaven
Quiet influence that permeates the whole.
Jesus likens the kingdom to leaven working through dough: unseen, comprehensive transformation.
Scripture
Matthew 13:33
33 Another parable spake he unto them; The kingdom of heaven is like unto leaven, which a woman took, and hid in three measures of meal, till the whole was leavened.
Luke 13:20-21
20 And again he said, Whereunto shall I liken the kingdom of God?
21 It is like leaven, which a woman took and hid in three measures of meal, till the whole was leavened.