Joy is Such a Human Madness: The Duff Between Us (essay) by Ross Gay

Or, like this: in healthy forests, which we might imagine to exist mostly above ground, and be wrong in our imagining, given as the bulk of the tree, the roots, are reaching through the earth below, there exists a constant communication between those roots and mycelium, where often the ill or weak or stressed are supported by the strong and surplused.

By which I mean a tree over there needs nitrogen, and a nearby tree has extra, so the hyphae (so close to hyphen, the handshake of the punctuation world), the fungal ambulances, ferry it over. Constantly. This tree to that. That to this. And that in a tablespoon of rich fungal duff (a delight: the phrase fungal duff, meaning a healthy forest soil, swirling with the living the dead make) are miles and miles of hyphae, handshakes, who get a little sugar for their work. The pronoun who turned the mushrooms into people, yes it did. Evolved the people into mushrooms.

Because in trying to articulate what, perhaps, joy is, it has occurred to me that among other things–the trees and the mushrooms have shown me this–joy is the mostly invisible, the underground union between us, you and me, which is, among other things, the great fact of our life and the lives of everyone and thing we love going away. If we sink a spoon into that fact, into the duff between us, we will find it teeming. It will look like all the books ever written. It will look like all the nerves in a body. We might call it sorrow, but we might call it a union, one that, once we notice it, once we bring it into the light, might become flower and food. Might be joy.

from The Book of Delights