The sower in this story is the authorized preacher of the word of God; he implants the seed of the gospel in the hearts of men, knowing not what the issue shall be. Passing on to similar or other ministry elsewhere, attending to his appointed duties in other fields, he, with faith and hope, leaves with God the result of his planting. In the harvest of souls converted through his labor, he is enriched and made to rejoice.[629] This parable was probably directed more particularly to the apostles and the most devoted of the other disciples, rather than to the multitude at large; the lesson is one for teachers, for workers in the Lord's fields, for the chosen sowers and reapers. It is of perennial value, as truly applicable today as when first spoken. Let the seed be sown, even though the sower be straightway called to other fields or other duties; in the gladsome harvest he shall find his recompense. 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."[630] This little story, addressed to the assembled multitude, must have set many thinking, because of the simplicity of the incident related and the thoroughly un-Jewish application made of it. To the mind taught by teachers of the time the kingdom was to be great and glorious from its beginning; it was to be ushered in by blare of trumpets and tramp of armies, with King Messiah at the head; yet this new Teacher spoke of it as having so small a beginning as to be comparable to a mustard seed. To make the illustration more effective He specified that the seed spoken of was "the least of all seeds." This superlative expression was made in a relative sense; for there were and are smaller seeds than the mustard, even among garden plants, among which rue and poppy have been named; but each of these plants is very small in maturity, while the well-cultivated mustard plant is one of the greatest among common herbs, and presents a strong contrast of growth from tiny seed to spreading shrub.