The kingdom grows...
Intro
31 He put another parable before them, saying, “The kingdom of heaven is like a grain of mustard seed that a man took and sowed in his field. 32 It is the smallest of all seeds, but when it has grown it is larger than all the garden plants and becomes a tree, so that the birds of the air come and make nests in its branches.”
13:31 mustard seed A tiny seed that grows into a 10-foot-high shrub. The shrub grew along the shores of the Sea of Galilee and may have been immediately in view of Jesus’ hearers.
13:32 the smallest of all the seeds Refers to seeds planted by farmers in Galilee. Rabbis used the mustard seed as a proverbial object to denote the smallest possible amount or size of something. Compare Matt 17:20.
19 Then the disciples came to Jesus privately and said, “Why could we not cast it out?” 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.”
13:31–33 The next two parables in ch. 13 stress the inevitable growth of the kingdom of heaven, despite the resistance it faces. The parable of the mustard seed contrasts the seemingly insignificant inception of the kingdom of heaven, in the world and in a person’s life, with its momentous results.