The Parable of the Mustard Seed is one of the best known of Jesus’ teachings; we cite it often as a teaching on faith, but that is not what this parable is about. The faith connection comes from Matthew 17:20, which is not a parable. Rather, the Parable of the Mustard Seed is about the Kingdom. The same is also true of the Parable of Yeast, which Mark did not include in his account.
Matthew 13:33-35
He told them another parable: “The kingdom of heaven is like a mustard seed, which a man took and planted in his field. Though it is the smallest of all seeds, yet when it grows, it is the largest of garden plants and becomes a tree, so that the birds come and perch in its branches.”
He told them still another parable: “The kingdom of heaven is like yeast that a woman took and mixed into about sixty pounds of flour until it worked all through the dough.”
Jesus spoke all these things to the crowd in parables; he did not say anything to them without using a parable. So was fulfilled what was spoken through the prophet:
“I will open my mouth in parables,
I will utter things hidden since the creation of the world.”
Mark 4:30-34
Again he said, “What shall we say the kingdom of God is like, or what parable shall we use to describe it? It is like a mustard seed, which is the smallest of all seeds on earth. Yet when planted, it grows and becomes the largest of all garden plants, with such big branches that the birds can perch in its shade.”
With many similar parables Jesus spoke the word to them, as much as they could understand. He did not say anything to them without using a parable. But when he was alone with his own disciples, he explained everything.
I doubt that Jesus was intending to give a lecture on botany here, but He clearly used frames of reference His listeners were familiar with: Mustard seeds are tiny, yet they grow into very large plants. That is the point of the metaphor, tiny seed becomes very big plant. How does this apply to the Kingdom?
If I was an atheist, I would be asking myself how it is possible that an obscure travelling teacher from first century Galilee is still a controversial figure all over the world twenty centuries after his death. Yes, that’s right, a carpenter’s son born in a stable who grew up in flyover country became the most influential figure in history, yet he never traveled more than a hundred miles or so from his birthplace.
After his death, a ragtag bunch of misfits from the provinces, just a handful of them mind you, unleashed a revolutionary idea in the minor provincial capital of Jerusalem. They were opposed by the greatest power the world had ever seen, and Mr. Atheist, you are still opposing this teaching today. How could this have happened? It’s simply incredible!
As Jesus told us, the Kingdom is like that. A tiny seed grows into the largest of garden plants, big enough to give shelter to the birds; it just wouldn’t seem likely at all… but there it is. It isn’t reported in the text, but I have a hunch this is what Jesus explained to His disciples. Yes, they were obscure, true, they weren’t important big shots from famous and powerful families, and they were young, very young. Yet, in spite of all outward appearances, they made a huge mark on history, and more importantly, they made a huge difference for God’s salvation plan, in spite of all apparent circumstances.
Jesus continues His teaching of parables with the Parable of Yeast. As before, He begins with the words, “The Kingdom of Heaven is like…” denoting that 1) this is a parable (Is like) and 2) that the subject is indeed the kingdom of Heaven. The Parable of Yeast is similar to that of the mustard seed, for when we put a small amount of yeast into the flour to make the dough for bread, little would we suspect that such a small amount yeast would find its way into the entire dough mixture, becoming something so powerful that it entirely changes the nature of the dough. The Kingdom is like that because it comes into the world, and changes everything; no wonder it is opposed so fiercely!
The section ends with Matthew yet again showing us how this speech of Jesus’ ties into Israel’s history of prophecy.











