The speaker wishes life came with instructions. They want a rulebook that says how to "be," what to talk about and when, and what to do when action is called for. The wish sounds practical, almost small, but it points to a deeper unease: they don't feel they know how to exist among other people without getting it wrong.
The last lines make that clear. Every step, every breath, is "wrong." The word "every" leaves no room for exceptions, and including something as basic as breathing suggests the speaker feels out of place in their own life, not just in awkward moments. The title "Lapse" may hint at a slip or failure, though the poem leaves that open.
The mood is quiet, anxious, and heavy with self-doubt. The lowercase "i" and the plain, unadorned phrasing make it feel like a private confession, a thought said softly rather than performed. It's a short poem, but it captures how exhausting it can be to feel permanently out of step.