The Parable of the Grain of Mustard Seed
31 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:
32 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.
The Prophet Joseph Smith said:
“And again, another parable put [the Savior] forth unto them, having an allusion to the Kingdom that should be set up just previous to or at the time of the harvest, which reads as follows—‘The Kingdom of Heaven is like 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.’ [Matthew 13:31–32.] Now we can discover plainly that this figure is given to represent the Church as it shall come forth in the last days. Behold, the Kingdom of Heaven is likened unto it. Now, what is like unto it?
“Let us take the Book of Mormon, which a man took and hid in his field, securing it by his faith, to spring up in the last days, or in due time; let us behold it coming forth out of the ground, which is indeed accounted the least of all seeds, but behold it branching forth, yea, even towering with lofty branches and Godlike majesty, until it, like the mustard seed, becomes the greatest of all herbs. And it is truth, and it has sprouted and come forth out of the earth, and righteousness begins to look down from heaven [see Psalm 85:11; Moses 7:62], and God is sending down His powers, gifts, and angels to lodge in the branches thereof.
“The Kingdom of Heaven is like unto a mustard seed. Behold, then, is not this the Kingdom of Heaven that is raising its head in the last days in the majesty of its God, even the Church of the Latter-day Saints, like an impenetrable, immovable rock in the midst of the mighty deep, exposed to the storms and tempests of Satan, that has, thus far, remained steadfast, and is still braving the mountain waves of opposition, which are driven by the tempestuous winds of sinking crafts, which have [dashed] and are still dashing with tremendous foam across its triumphant brow; urged onward with redoubled fury by the enemy of righteousness?”
(Teachings of Presidents of the Church: Joseph Smith , 142–43.)