Luke 13:20,21

Again Jesus said, "To what will I liken the kingdom of God? It is like leaven, which a woman took and hid in three measures of meal, until the whole was leavened."

This is an illustration which Jesus took from his own home. In those days bread was baked at home. Leaven was a little piece of dough which had been kept over from the last baking and had fermented in the keeping. Leaven is regularly used in Jewish thought for influence, usually for bad influence, because the Jews identified fermentation with putrefaction. Jesus had seen Mary put a little bit of leaven in the dough and had seen the whole character of the dough changed because of it. "That, he said, "is how my kingdom comes."

There are two interpretations of this parable. From the first the following points emerge.

(i) The kingdom of heaven starts from the smallest beginnings. The leaven was very small but it changed the whole character of the dough. We well know how in any court, or committee, or board, one person can be a focus of trouble or a centre of peace. The kingdom of heaven starts from the dedicated lives of individual men and women. In the place where we work or live we may be the only professing Christians; if that be so, it is our task to be the leaven of the kingdom there.

(ii) The kingdom of heaven works unseen. We do not see the leaven working but all the time it is fulfilling its function. The kingdom is on the way. Anyone who knows a little history will be bound to see that. Seneca, than whom the Romans had no higher thinker, could write, "We strangle a mad dog; we slaughter a fierce ox; we plunge the knife into sickly cattle lest they taint the herd; children who are born weakly and deformed we drown." In A.D. 60 that was the normal thing. Things like that cannot happen today because slowly, but inevitably, the kingdom is on the way.

(iii) The kingdom of heaven works from inside. As long as the leaven was outside the dough it was powerless to help; it had to get right inside. We will never change men from the outside. New houses, new conditions, better material things change only the surface. It is the task of Christianity to make new men; and once the new men are created a new world will surely follow. That is why the church is the most important institution in the world; it is the factory where men are produced.

(iv) The power of the kingdom comes from outside. The dough had no power to change itself. Neither have we. We have tried and failed. To change life we need a power outside and beyond us. We need the master of life, and he is forever waiting to give us the secret of victorious living.

The second interpretation of this parable insists that so far from working unseen the work of the leaven is manifest to all because it turns the dough into a bubbling, seething mass. On this basis, the leaven stands for the disturbing power of Christianity. In Thessalonica it was said of the Christians, "These men who have turned the world upside down have come here also" (Acts 17:6). True religion is never dope; never sends people comfortably to sleep; never makes them placidly accept the evils that should be striven against. Real Christianity is the most revolutionary thing in the world; it works revolution in the individual life and in society. "May God, said Unamuno the great Spanish mystic, "deny you peace and give you glory." The kingdom of heaven is the leaven which fills a man at one and the same time with the peace of God and with the divine discontent which will not rest until the evils of earth are swept away by the changing, revolutionizing power of God.

THE RISK OF BEING SHUT OUT (Luke 13:22-30)