Isolated is a tiny poem, but it feels crowded with weight. In the first stanza the speaker says that "several places" have cost them "the very outside." It's an odd, striking phrase. It could mean that moving through different places, or being shut in them, has taken away the sense of a world beyond oneself, a feeling of openness or belonging. The poem doesn't say which, and that gap leaves the loss feeling vague and hard to name.
The second stanza turns inward. The speaker calls out "o my heavy house," as if talking to their own dwelling, and says they are "alone with my doubt." The house may be a literal home, but it also reads like a picture of the mind or the self: something solid, burdensome and impossible to leave. Doubt seems to share the space with the speaker like a second occupant.
The mood is quiet, closed-in and a little sorrowful. The short lines and spare wording make the isolation feel tight and echoing.