The speaker sets off on a long walk toward a place where nothing is expected of them. It sounds like freedom, and partly it is. But the poem is slyly honest about what escape costs. Once the speaker is "out of body," even words, usually such a reliable companion for a poet, "take no notice" of them. They have slipped out of the world's attention, and perhaps their own.
The middle lines carry a quiet wistfulness. "I could be industrious / or in love" suggests that the speaker has stepped outside the roles that give a life shape, and that either one is still possible, just out of reach. The last stanza turns uneasy: they have gone too far to walk it all back. The word "thought" may be a slip for "though," or it may be deliberate, a thought that stops the walk. Either way, the mood is calm, drifting and a little lonely, with a faint worry that escape has no return route.