Does one crush grain for bread? No, he does not thresh it forever; when he drives his cart wheel over it with his horses, he does not crush it.
This parable, which (like many of our Saviour's parables) is borrowed from the husbandman's calling, is ushered in with a solemn preface demanding attention, He that has ears to hear, let him hear, hear and understand, Isa 28:23. I. The parable here is plain enough, that the husbandman applies himself to the business of his calling with a great deal of pains and prudence, secundum...
Commenting on Isaiah 28:23-29
This also cometh from the Lord of hosts,.... All this wisdom the husbandman has, in manuring his ground, in sowing it with proper seed, and in threshing it out in a manner suitable to it. Agriculture or husbandry, even among the Heathens, is always ascribed to God, as an invention of his, and it was the first work which God put man to, and instructed...
Bread corn--corn of which bread is made. bruised--threshed with the corn-drag (as contrasted with dill and cummin, "beaten with the staff"), or, "trodden out" by the hoofs of cattle driven over it on the threshing-floor [G. V. SMITH], (Deu 25:4; Mic 4:13). because--rather, "but" [HORSLEY]; though the corn is threshed with the heavy instrument, yet he will not always be thus threshing it.