Twelve syllables are all Dave Bonta needs to stage a small drama between a man and his own body. The speaker is exhausted by being busy, and instead of lecturing himself, he does something odder and more ancient: he casts a spell. The title calls the poem a "charm", and a charm is a spoken formula meant to make something happen. Charms don't argue or reflect. They command, and that is exactly what this poem does.
The first surprise is who gets commanded. Busyness is usually thought of as a state of mind, a crowded calendar or a racing head. Here it lives in the legs. "O my legs" addresses them as if they were separate creatures, perhaps restless animals or children who won't settle. The word "O" is old-fashioned and ceremonial, the sound of prayers and odes, and set against such a humble subject it is gently funny. The speaker sounds both solemn and slightly self-mocking, a man talking to his knees with all the formality of a priest. It also suggests something true about overwork: the body keeps going on its own momentum, long after the self has had enough. The mind can't simply decide to stop, so the speaker appeals to the machinery directly.
The commands themselves seem to contradict each other. "Be still" and "be off" point in opposite directions, one toward stopping and the other toward leaving. The repeated "be" holds them together as a pair of parallel orders, and the missing punctuation lets them run into each other, so the line almost reads as a single instruction. That is the poem's central idea: stillness isn't the same as doing nothing. The legs are not told to collapse where they stand. They are told to travel, to carry the speaker to the one place where travelling ends. Rest, the poem implies, is a destination, and you have to move in order to arrive.
The line lengths act this out. The poem opens with three syllables, then two, a short, hushed stutter that sounds like trying to calm something down. The third line swells to five syllables, the longest of the poem: "be off to my wife." Here the legs are finally released, and the phrase "be off", brisk and slightly dismissive, like shooing someone out of a room, gives the line its push. Then the last line shrinks back to two syllables, "to bed", ending on a hard, closed *d*. The poem walks and then lies down. There is no rhyme, which suits the subject, since rhyme tends to chime and drive a poem forward, while this one wants to settle without a flourish.
The most affecting choice is "my wife". The speaker could have ordered his legs straight to bed, and the line would have meant simple tiredness. Instead the line break places the wife on her own, and "to bed" follows almost as an afterthought, or as the place where she is found. The cure for busyness turns out to be a person, not just a pillow. The possessive "my" is plain and domestic and carries a quiet warmth. It also gives "charm" a second shade of meaning, since the word can mean enchantment as well as a spell. The poem never says what makes the evening's destination so inviting, and it doesn't have to. A reader fills in the lamp, the blankets, the familiar presence.
What makes the poem worth reading is how well its form matches its argument. A busy culture would call twelve syllables a throwaway, but this tiny poem refuses to be busy itself. It has no extra images, no explanation, and no moral tacked on at the end. It makes its point by occupying very little room and then stopping, which is what it asks the legs to do. For a student, it is a good example of how compression can be a kind of meaning: every word is an instruction, and the last one is a place to lie down.