Pain that leaves no mark is the subject of cloudsonthemoon's "comparison," and the poem's whole project is to make that pain visible. It runs through a short ladder of injuries, from bruises to gashes to a knife, and each one is set against a body that looks perfectly fine. The central idea is simple and unsettling: a person can be badly hurt without anyone, including themselves, being able to point to the wound. The final questions suggest this is the cruelest part, because the hurt is real and has nowhere to go.
The title tells us how to read it. A comparison sets one thing beside another, and here emotional pain is measured against physical injury. The poem never uses "like" or "as." It just says that people have bruises, gashes and knife wounds, and lets us understand that none of this is literal. The metaphor is so complete that the real subject, emotional suffering, is never named.
The opening image is the strangest and most precise. "Bruises hidden under their skin coat" turns skin into clothing, something you put on to leave the house. Ordinarily a bruise shows through skin. Here skin is what conceals it, so the body becomes a kind of costume. The second couplet adds a time of day: nobody thinks about the hurt "until the sun sinks below the windowsill." The sibilance of "sun sinks" slows the line down like dusk, and the windowsill puts us indoors, in a private space. Daylight, the poem implies, is for performing being fine. Only when it fades does the pain come into view.
The third couplet raises the stakes. Bruises become "deep gashes," and they are "covered by their bodies," as if the body were a lid. Then comes the poem's most striking line: "the knife was driven through but didn't pierce any skin." This is impossible as a physical event, and that is the point. The contradiction forces the reader to admit that the wound cannot be literal, while the verb "driven" keeps the violence of it. The repeated word "skin" (in the first line, the second, and again here) works like a boundary the poem keeps pressing against, reminding us that everything important happens on the wrong side of it.
Structurally, the poem is four couplets in free verse with no rhyme. Its lowercase, unpunctuated style gives it the feel of a thought spoken quietly rather than a polished statement. The first three couplets move steadily from "everyone" to "nobody" to "some people," narrowing from a universal observation to those who suffer most. Then the poem turns, and the only two question marks appear. "So why did it hurt so bad?" sounds almost childlike in its plain wording, as though someone is trying to square their feelings with the lack of evidence. The grammar suggests the question is real, not rhetorical.
The last line is by far the longest, and it spills past the rhythm of everything before it, as if the speaker can't stop once they start. It also contains the most jarring image: they would "rather staple them shut" than open their eyes to the day. Staples belong to offices and paperwork, and bringing one near an eye is both mundane and horrifying. It also completes the poem's pattern of escalation, from bruise to gash to knife to a self-inflicted act. Nobody here is hurting themselves for real; the image shows how heavy it feels to wake up. The shift to "would" gives the line a hypothetical, almost confessional tone, and it is worth noticing that the poem stays in the third person throughout. Judging by the intensity of the ending, the "they" may be a way of speaking about oneself at a safe distance, though that is an inference from the text.
What makes the poem worth reading is how much it does with so little. It does not offer advice or a hopeful turn. It simply validates an experience many people recognise, that invisible pain is still pain, and that being unable to prove it makes it harder to carry. By borrowing the language of injury, it gives that feeling a shape a reader can see.