Where there is soil, there is water and there is grass. Whitman's My Song

Grass and wildfires have never completely consumed them, and they are tall again in the spring breeze. . .

Grass is so insignificant in the vast land, but it grows in every corner of the world with the most tenacious will, no matter how barren and fertile the land is. As long as there is a little soil and water, they will always keep their heads close to the sun.

It also represents some characteristics of human beings, perhaps bad habits or good spirits. In short, it is profound. I have understood it for a long time.