Mustard and Leaven

Matthew 13 contains several parables about the kingdom of heaven. Two of these parables—the mustard seed and the leaven—make the same basic point about the growth of the kingdom but with slightly different shades of meaning. Both challenge our preconceptions about the way the kingdom should work. 1) The mustard seed. “The kingdom of heaven is like a grain of mustard seed that a man took and sowed in his field. 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” (Matt. 13:31-32). Mustard was the smallest seed commonly planted in the gardens of Judea. It was so small that you could barely see it, yet it grew to an impressive size of ten to twelve feet tall. In its mature state, the mustard tree was able to be climbed and provided a home for birds’ nests. You would never expect that such a tiny seed could amount to so much! The insignificance of the churc...