All humanity is like grass sounds like an insult.  The significance of all humanity is like the flower of the grass.

For All flesh is like grass, and all its glory like a flower of the grass. The grass withers, and the flower falls,
1 Peter 1:24 CSB

https://bible.com/bible/1713/1pe.1.24.CSB

One has to be intrigued by the beauty and productivity of the lowly human and his potential to escape insignificance, one by one!