"Overnight, very
Whitely, discreetly,
Very quietly
Nobody sees us,
Stops us, betrays us;
The small grains make room.
...
We are shelves, we are
Tables, we are meek,
We are edible,
Nudgers and shovers
In spite of ourselves.
Our kind multiplies:
We shall by morning
Inherit the earth.
Our foot’s in the door."
-Excerpted from Sylvia Plath's "Mushroom" poem
I don't think anyone could explain them better.