To practice, we are not merely observing things as earth, but we immerse ourselves in the earth, realizing unity of perception, seeing everything as earth itself:

My experience, this very body and mind, is earth. And all experiences, without exception, rise and fall back into earth. Nothing stays in experience. From this earth-element, thoughts arise, feelings arise, memories arise, but none of them remain suspended. Each one, no matter how high or bright, falls back to earth.

Joy rises, it is earth. Fear rises, it is earth. Craving rises, it too is earth. All formations arise from earth and dissolve into earth.

Nothing escapes this gravity. All formations return. Like ashes falling on ashes, like dust settling on dust, all experience returns to where it all came from, earth.

So what is there to cling to? Where is the 'me, myself, or mine' in all of this?