What is the drooping of mature ears of wheat?

Mature ears of wheat, because the ears of wheat are mature and the grains are full and firm, will be heavier and will hang down, just like a person with his head down. There is only one empty and shriveled ear of wheat, because it is empty and weightless, so it will remain firm.

This is similar to saying that when a person matures, he will become more and more humble. Because the more knowledge you have in your mind, the more willing you are to bow your head. This is a kind of maturity similar to the ear of wheat, and it is a manifestation of a person's maturity. Only ignorant and arrogant people are always on their high horse.

So this is to persuade people to be mature, modest and have a modest heart, so that a person's mind is full, thoughtful and connotative.