The cave is a dark, shadowy place. It's a place that's very close and yet distant at the same time, and it's a place of revelation and isolation. Your form, your body, your writing is your confinement.
The act of writing itself isn't outrageous. And the institution subtly and insidiously works on you in such a way that though you seem to have freedom you become a servant. Your main issue is to get promoted to the next thing. Or get invited to a picnic. Or get tenure. Or get laid.
I've changed over my writing life. If I can generalize, I would say that the more recent poems - believe it or not - are more pointedly political; although, if the earlier poems were more existential, they were still political; though, in their own way, had a complicated presence.