If you wanted to be funny about it, you could say that Jerry Saltz and Roberta Smith, who occupy the center of the documentary “House of Criticism,” are like characters out of a Christopher Guest movie. Both are venerable New York art critics — but the thing is, they’re married New York art critics, whose lives revolve entirely around art and art criticism and talking about art and art criticism. They eat, breathe, sleep and dream it. In the Guest mockumentary of my imagination, the two would be played by Bob Balaban and Parker Posey, and they would be blissfully cracked egghead eccentrics who think that art is the most important thing in the world because it’s the most important thing in the world to them.

At moments, “House of Criticism” does throw off unintentional comic sparks of art-world insularity. But I’m kidding, ultimately, since underneath that it’s a pensive and touching documentary, and it happens to be about two writers I greatly admire. Roberta Smith, the co-chief art critic of the New York Times, and Jerry Saltz, the art critic of New York magazine, are writers of sway, elegance, legend. They’re two of the last powerful legacy critics in America, and both are fantastic writers. For them, the love of art is a mission, at once sophisticated and childlike. Roberta calls art “the most advanced operating system that our species has devised to explore consciousness, the seen and the unseeable.” The way art connects (and saves) these two on a daily basis is its own rarefied story, and it speaks to a certain vanishing culture of passionate New York literary brainiacs that used to be thought of as almost the essence of the city.