Forgetting is usually small and clumsy: a lost key, a name that won't come. Here the speaker has forgotten something much larger, the experience of being happy. In four short lines, "Untitled Part 31" traces a loss that starts with a single emotion and ends with the speaker's own identity. Its central idea is that deep sadness does more than replace happiness. It erases the memory of what happiness was, and eventually the person who could feel it.
The poem's main structural device is repetition. Every line opens with "I forgot," and the sameness reads like a person counting up losses and finding the list never stops. The repeated phrase also works as a drumbeat that gets heavier because nothing relieves it. There is no "but," no "yet," and no hint of what caused the loss or whether it will end. We are given a condition, not a story.
What changes is the object of each "forgot," and the order matters. First comes "the feeling of happiness," an abstract noun, something general and almost textbook-like. Line two becomes more bodily: "what joy feels like." Then the poem turns visual with "the image of true smiles," as if happiness were a photograph that has faded past recognition. The word "true" quietly suggests there are other smiles, false ones, and that the speaker may still know how to make those. What has been lost is the real thing behind the expression. Finally, the fourth line drops emotion and perception altogether: "I forgot how to be me." The movement from feeling to sensation to image to self is a narrowing, like a room with the lights going out one by one.
The last line is the most interesting to look at closely. It contains a small paradox. If the speaker has forgotten how to be "me," who is the "I" doing the remembering and reporting? The poem opens with "I" as the grammatical subject and ends with "me," the object. The self has been split in two, one part watching and one part missing. That gap is where the poem's pain sits. The speaker is clear-sighted enough to see the loss, but not able to undo it.
The sound and rhythm support this. The poem has no rhyme, and its words are plain and mostly one syllable: "joy," "smiles," "be," "me." Counting syllables, the lines alternate long and short (nine, six, eight, six), a faint see-saw that never settles into a pattern comfortable enough to be soothing. Each line is also a complete statement with no enjambment, so nothing flows into anything else. The short fourth line ends on the flat, closing sound of "me," with nowhere further to go. Punctuation adds a small detail. The first two lines end in full stops, but the third has none, so it seems to tumble into the last line, which then lands with a stop. Whether that is deliberate or a slip, the effect fits: the loss accelerates and then hits bottom.
The poem's language is also notable for what it leaves out. There are no metaphors of darkness or storms, no weather, no ornament. The speaker doesn't say "I am sad." They describe an absence, and the bareness of the diction acts out the numbness it describes. Colorful imagery would have contradicted the emptiness. The title, "Untitled Part 31," suggests, as an inference, that this is one piece in a numbered sequence. Even read alone, though, it is complete, and the lack of a title feels apt for a speaker who can't name what they have lost.
Its significance lies in this restraint. Many poems about unhappiness describe what hurts. This one describes the more disorienting experience of no longer being able to imagine feeling otherwise. Because the language is so ordinary, almost any reader can step into it. Anyone who has felt flat, tired, or cut off from themselves will recognize "I forgot what joy feels like" as a plain statement of fact. The poem's quiet achievement is to make that experience visible in under thirty words, and to leave us with the unsettling thought that the hardest thing to lose might be the memory of who we were when we were glad.