What's the difference between worthless husk and nourishing grain? Jeremiah uses this agricultural image to highlight the vast gulf between human dreams and God's pure message.
The powerful imagery of chaff and wheat drives home the point. Chaff is the husk, the protective covering of a grain, that is separated and discarded during harvest. It has no nutritional value and is essentially waste. Wheat, on the other hand, is the essential grain, the substance that sustains life. God's word is compared to wheat – it nourishes the soul, provides true sustenance, and has lasting value. The dreams and fabricated prophecies of the false prophets are like chaff, empty and useless. Jeremiah isn't just saying they are different; he's emphasizing that one is vital and the other is worthless, making it clear there's no comparison between them.