I'm living so far beyond my income that we may almost be said to be living apart.

This is a compact epigram built on a financial metaphor turned into a domestic one. “Living beyond my income” is a familiar confession of overspending; Cummings (or the attributed speaker) pushes it into absurdity by treating “income” as if it were a spouse or housemate from whom one can become physically separated—“living apart.” The joke depends on the double sense of “beyond”: exceeding one’s means and being at a distance from them. Beneath the wit is a pointed comment on modern consumer habits and self-deception: the speaker recognizes the gap between resources and lifestyle, yet frames it as a clever quip rather than a crisis, exposing how humor can mask financial irresponsibility.