The two parables which now claim our attention, although closely allied, are not in meaning and application precisely identical. Both show the progress of the kingdom from a small beginning to a glorious consummation; and both indicate that this growth, as to cause, is due to its own inherent unquenchable life, and as to manner, is silent, secret, unobserved. Thus far these two are in the main coincident; but besides teaching the same lesson in different forms, they teach also different lessons. The parable of the mustard-seed exhibits the kingdom in its own independent existence, inherent life, and irresistible power; the parable of the leaven exhibits the kingdom in contact with the world, gradually overcoming and assimilating and absorbing that world into itself. Both alike show that the kingdom increases from small to great; the first points to the essential, and the second to the instrumental cause of that increase: in the mustard-seed we see it growing great because of its own omnipotent vitality; in the leaven we see it growing great because it uses up all its adversaries as the material of its own enlargement. III. THE MUSTARD-SEED. "Another parable put he forth unto them, saying, The kingdom of heaven is like to a grain of mustard-seed, which a man took, and sowed in his field: which indeed is the least of all seeds: but when it is grown, it is the greatest among herbs, and becometh a tree, so that the birds of the air come and lodge in the branches thereof."--MATT. xiii. 31, 32.