Dawn Herrera-Helphand at The Point:
Arendt calls the private realm “the realm of necessity.” The language is hers, but it’s a variation on an old binary theme, the song of necessity and freedom. Figured variously as chaos, the animal, the feminine and the shadow realm, human necessity is the umbrella term for those aspects of life not subject to the rational will. In Arendt’s understanding, it especially signifies the immediate reality of embodied life, the thick stuff of it, the part that’s been squicking out Western squares from Plato to the present. To the chagrin of the Platonist, it is an irreducible aspect of our living being.
In its most mundane iterations, necessity is a driving and an equalizing force that compels everyone. We all eat and drink, we shit, we sleep and probably try to get off—you, yes you. With luck, the resources for doing so are reasonably secure and we can meet these demands with dignity, securely and without fear of opprobrium at the salience of our appetites and drives. Fussing over particulars aside, there is not a lot of room for reason-giving or reason-having in this realm of experience. Bodies drive us in some things. We do them because we are essentially beholden—we have to. And, having to do them, we prefer to do them in private.
Pain is the most intense manifestation of this phenomenon. As Elaine Scarry puts it in The Body in Pain (1985), pain brings about “a state anterior to language, to the sounds and cries a human being makes before language is learned.”
more here.