What is a monument built to remember?

Now here I come bouncing in. 

I will give a test to those who know my works, as a juggler knows the balls. 

I wrote a line on the grass, and it is my greatest. 

Can the wiseacres tell me the rest?

One suggested the line—

A leaf of grass is the journey-work of heaven—the handkerchief of the Lord.

No. No. No. 

But tell me the line I would build a monument to. 

It is—

Grass is the uncut hair of graves.

—Walter (Walt) Whitman

The Twentieth Plane—A Psychic Revelation