The greatest among herbs.—More literally, greater than the herbs—i.e., belonging to a higher order of vegetation.

Grain of mustard-seed - The plant here described was very different from that which is known among us. It was several years before it bore fruit and became properly a tree. Mustard, with us, is an annual plant: it is always small, and is properly an herb. The Hebrew writers speak of the mustard-tree as one on which they could "climb," as on a fig-tree. Its size was much owing to the climate. All plants of that nature grow much larger in a warm climate, like that of Palestine, than in colder regions. The seeds of this tree were remarkably small, so that they, with the great size of the plant, were an apt illustration of the progress of the church and of the nature of faith, Matthew 17:20.

"I have seen," says Dr. Thomson,this plant on the rich plain of Akkar as tall as the horse and his rider. It has occurred to me on former visits that the mustard-tree of the parable probably grew at this spot, or possibly at Tabiga, near Capernaum, for the water in both is somewhat similar, and so are the vegetable productions. To furnish an adequate basis for the proverb, it is necessary to suppose that a variety of it was cultivated in the time of our Saviour, which grew to an enormous size, and shot forth large branches, so that the fowls of the air could lodge in the branches of it. It may have been perennial, and have grown to a considerable tree; and there are traditions in the country of such so large that a man could climb into them; and after having seen "red pepper" bushes grow on year after year, into tall shrubs, and the "castor-bean" line the brooks about Damascus like the willows and the poplars, I can readily credit the existence of mustard-trees large enough to meet all the demands of our Lord's parable. - "The Land and the Book," vol. ii. p. 101.

Young converts often suppose they have much religion. It is not so. They are, indeed, in a new world. Their hearts glow with new affections. They have an elevation, an ecstasy of emotion, which they may not have afterward like a blind man suddenly restored to sight. The sensation is new and especially vivid, yet little is seen distinctly. His impressions are indeed more vivid and cheering than those of him who has long seen and to whom objects are familiar. In a little time, too, the young convert will see more distinctly, will judge more intelligently, will love more strongly, though not with so much "new emotion," and will be prepared to make more sacrifices for the cause of Christ.

but when it is grown, it is the greatest among herbs—not absolutely, but in relation to the small size of the seed, and in warm latitudes proverbially great.

and becometh a tree, so that the birds of the air come and lodge in the branches thereof—This is added, no doubt, to express the amplitude of the tree. But as this seed has a hot, fiery vigor, gives out its best virtues when bruised, and is grateful to the taste of birds, which are accordingly attracted to its branches both for shelter and food, is it straining the parable, asks Trench, to suppose that, besides the wonderful growth of His kingdom, our Lord selected this seed to illustrate further the shelter, repose and blessedness it is destined to afford to the nations of the world?

The Leaven (Mt 13:33).

Matthew 17:20. Not but there are seeds lesser than this; but the meaning is, that this is one of the least of all seeds; or was the least of seeds, which were commonly known in Judea; or the very least which grew to the size this sometimes did, and as here related. Now this is designed to express the small beginnings of the Gospel dispensation, of the ministry of the word, of the grace of God in the hearts of his people, and of the small number of them at first. The Gospel, and the ministry of it were like a grain of mustard seed, little, mean, and contemptible; the author of it, Christ, was so to the Jews, in his birth, parentage, education, and outward appearance; the subject of it a crucified Christ, and salvation by him; and the doctrines out of the reach, and contrary to carnal reason; the preachers of it, were persons of very mean and low life, few in number, weak, illiterate, and despicable, and the whole world against them; the circumstances which attended the Gospel were very discouraging; it was charged with novelty, represented as contrary to common sense, and the reason of mankind, and as opening a door to licentiousness; and was followed with violent opposition and persecution, wherever it went. The grace of God, which under the ministry of the word is implanted in the hearts of the Lord's people, is at first very small, like a grain of mustard seed; it is a day of small things; faith in Christ is very weak and low, spiritual strength small, comfort little, experience of the love of God not large, light and knowledge in the doctrines of grace but very obscure and glimmering: the church of God, which sprung up under the ministry of the word, and through the work of grace, upon the hearts of particular persons, was like the small grain of mustard seed; the persons of which it consisted were but few in number in Christ's time, and at his ascension into heaven, and when the Gospel was first preached among the Gentiles; and those persons which laid the foundation, and were at the beginning of the Gospel church state, made a very contemptible figure, by reason of their outward poverty, and mean circumstances in the world; and on account of the severe persecutions which every where attended them; and also through the errors and heresies introduced by evil men, that crept in among them,

But when it is grown, it is the greatest among herbs, and becometh a tree. Luke says, "a great tree", Luke 13:19 for to such a size did the mustard tree grow in the land of Judea, of which take the following instances (x),

"At Shichin there was a mustard stalk, which had three branches, and one of them was cut down, and they covered a potter's booth with it; and found in it , "three kabs of mustard seed" (elsewhere (y) it is said, nine kabs). Says R. Simeon ben Chelphetha, I have one stalk of mustard seed in my field, and I go up to it, .

"as one goes up to the top of a fig tree".

And though the mustard tree grew to this height and size, it was reckoned among herbs, as here by Christ; for they say (z),

"they do not put mustard in a field of fruits, but in a field of herbs.

All which serve to illustrate and confirm the account here given by Christ, and alluded to; and which expresses the very large growth and increase of the Gospel, and the ministry of it; of the grace of God in the heart, and of the church of Christ, and his interest in the world: of the Gospel, and the ministry of it, as to its large spread in the world; which at first was confined to the Jews, but was afterwards published to the Gentiles, and carried through the whole world; and, in ages since, has made a considerable progress, particularly at the Reformation; and will make a much greater one, towards the end of time: and of the grace of God in the heart, which gradually increases to a full assurance of understanding of hope, and of faith, and to the measure of the stature of the fulness of Christ: and of the church of Christ, and his interest in the world; both as to the large numbers it did consist of in the times of the apostles, and since, and will more especially hereafter; for the church will fill the earth, and the kingdoms of the world will become the church, and all nations of the earth will flock unto it; the people of the Jews in general will be converted, and the fulness of the Gentiles will be brought in: as also with respect to the figure it will make through the great personages, the kings and princes of the earth, that will be in it; the great power and authority the saints will then have; the peace and prosperity that will be enjoyed by them; the spirituality, holiness, righteousness, love, and unity, there will be among them; as also the presence of God and of the Lamb, they will be favoured with; all which glory and happiness will be brought about by a plentiful effusion of the Spirit, and by the glorious appearance of Christ,

So that the birds of the air come and lodge in the branches thereof: by "the birds of the air", some think angels are meant, compared to "birds" for their harmlessness and innocence; for their readiness and swiftness to do the will of God; and for their warbling notes and tuneful songs of praise; and who may be called birds "of the air", or heaven, because of their habitation: now these delight to be in the church, to be under the shadow of the Gospel ministry, and to look into the mysteries of it. Though rather, the saints and people of God are intended, who, in Scripture, are sometimes compared to particular birds; as to the eagle, the dove, and sparrow; and to birds in general, because timorous, weak, and defenceless, are exposed to danger, and wonderfully delivered, and are very subject to wander and go astray; and because of their chirpings, and singing songs of praise to their God and Redeemer; and to birds of the air or heaven, because they are heaven born souls, are partakers of the heavenly calling, and are pressing for, and soaring aloft towards the high calling of God in Christ: now the Gospel ministry, and the Gospel church state, are very useful to these; they "come" thereunto willingly, and cheerfully, deliberately, and with dependence on the grace and strength of Christ; humbly, under a sense of their own unworthiness, and yet with joy and thankfulness; heartily, and with their faces thitherwards, and they also "lodge" therein. This is what they desire, and their hearts are set upon; here they determine to be, and it is their happiness to be here; the shadow of Gospel ordinances is very delightful, very refreshing, and very fruitful to them, and under which saints dwell with great safety; and what a coming of these birds will there be hither, and a tabernacling of them herein, at the latter day! which are greatly designed in this part of the parable,

(u) Misn. Kilaim, c. 3. sect. 2.((w) T. Bab. Beracot, fol. 31. 1. Megilla, fol. 23. 2. Nidda, fol. 66. 1.((x) T. Hieros. Peah, fol. 20. 2.((y) T. Bab, Cetubot, fol. 111. 2.((z) Misn. Kilaim, c. 2. sect. 8.