Elisa Gabbert in The Essay as Realm:

I think of an essay as a realm for both the writer and the reader. When I’m working on an essay, I’m entering a loosely defined space. If we borrow Alexander’s terms again, the essay in progress is “the site”: “It is essential to work on the site,” he writes, in A Pattern Language: Towns, Buildings, Construction; “Work on the site, stay on the site, let the site tell you its secrets.” Just by beginning to think about an essay as such—by forming the intention to write on an idea or theme—I’m opening a portal, I’m creating a site, a realm. It’s a place where all my best thinking can go for a period of time, a place where the thoughts can be collected and arranged for more density of meaning.

Any art is a portal. A painting, a song.

Wonderfully, any creative space is a portal.

The portal of all portals may just be the World Wide Web, where you can create solitary spaces as well as communal ones.