After heavy rain, earthworms cover the ground, and most of us step around them without a thought. Dickinson stops and does something stranger: she calls them "Our little Kinsmen." The phrase is half joke, half challenge. Kinsmen are relatives, people you cannot quite disown, and the poem's twelve lines work out what that relationship might mean. What begins as a small observation of nature ends as a question about who decides whether a life is worth anything.
The first stanza gives the speaker's honest, slightly squeamish view. The worms are "A Pink and Pulpy multitude," and the repeated p sounds make the phrase as soft and wet as the creatures it describes. "Multitude" gives the crowd a faintly biblical air, but "tepid Ground" pulls it back down. Tepid is the temperature of things that are neither warm nor cold, and it suggests a faint disgust at the damp, lukewarm earth. The dash after "Kinsmen" works like a pause, as if she has bent down for a closer look. Her verdict follows in the next stanza: "A needless life." The reasoning is almost economic. The worms are seen "In plenty," so no single one can matter.
Then the bird arrives, and Dickinson's wit sharpens. The bird comes "As to a Hospitality" and "breakfasted." The vocabulary of a polite meal, with a welcoming host and a civilised morning, is applied to one creature eating another, so the worm is both the host and the dish. In a grim way the bird gives the "needless" life a purpose, but the purpose is being eaten. Turning "breakfast" into a verb gives the sentence a brisk, cheerful tone that hides the violence, so the reader feels it without being told.
The third stanza turns the poem inward: "As I of He, so God of Me / I pondered, may have judged." The grammar is odd, since "I of He" ought to be "I of him," but the stripped-down parallel works like a proportion in mathematics: I am to the worm as God is to me. That is where the unease sits. If numbers and size decide worth, then human beings, also a multitude, might be just as "needless" to God. The poem never says what plays the bird's part in our case. Judging by the way the stanza stops short, that silence is deliberate, and it is more disturbing than any explanation.
The last two lines are deliberately slippery. The speaker "left the little Angle Worm / With Modesties enlarged." One reading is that she leaves the worm alone, giving up her contempt, so that its humble state is raised in her esteem. Another is that the humility is her own. The plural "Modesties" is strange, as if every worm had its own small dignity. "Angle Worm" is an older name for the earthworm, linked to fishing, but to the eye the word sits one letter away from "Angel." That may or may not be intended, though it suits a poem that moves from the ground to God so quickly.
The form supports this. Lines alternate between eight and six syllables, the pattern of a hymn, so a theological thought arrives in the dress of church music, scaled down to fit a worm. The rhyme tightens as the thinking settles. In the first stanza "seen" and "upon" do not chime at all. In the second, "Bird" and "breakfasted" share only a final d. By the third, "judged" and "enlarged" nearly meet. The sound comes together just as the speaker's attitude changes.
The poem matters because it shows how much Dickinson can fit into very little space. Her usual tools are here: odd capitals that make ordinary nouns look like characters, dashes that act as breaths, and a tone that is amused and serious at once. She begins with something small and a little repulsive, lets the reader smile at the bird's "Hospitality," and then turns the joke back on the person telling it. The final effect is not sentimental pity for worms. It is the recognition that anyone who passes judgment on the small is, in some larger view, small too.