Luke 13:20 Meaning

18Then said he, Unto what is the kingdom of God like? and whereunto shall I resemble it?

19It is like a grain of mustard seed, which a man took, and cast into his garden; and it grew, and waxed a great tree; and the fowls of the air lodged in the branches of it.

20And again he said, Whereunto shall I liken the kingdom of God?

21It is like leaven, which a woman took and hid in three measures of meal, till the whole was leavened.

22And he went through the cities and villages, teaching, and journeying toward Jerusalem.