Matthew 13:31-35

Then Jesus told another story: “The kingdom of heaven is like a mustard seed that a man planted in his field. That seed is the smallest of all seeds, but when it grows, it is one of the largest garden plants. It becomes big enough for the wild birds to come and build nests in its branches.” Then Jesus told another story: “The kingdom of heaven is like yeast that a woman took and hid in a large tub of flour until it made all the dough rise.” Jesus used stories to tell all these things to the people; he always used stories to teach them. This is as the prophet said: “I will speak using stories; I will tell things that have been secret since the world was made.”