Eight short lines, no capital letters, no punctuation, and still the poem manages a small, uncomfortable confession. The speaker begins by shrinking the self down to almost nothing, then admits that this almost-nothing still does damage, and does it to the people closest to him. The central idea is that harm doesn't need a large personality or a dramatic moment. Ordinary, half-attentive people can hurt those they love in tiny, routine ways, and then barely notice.
The title, "Bit part," sets up a theatrical frame that the opening line quietly extends. "The business of the self" can mean a person's affairs or occupation, but "business" is also a stage term for the small actions an actor performs while the main drama goes on elsewhere. So the self is cast as a minor role, a walk-on in a larger production. Calling it "thin stuff" strengthens the idea, since it sounds like cheap fabric or watery soup. The line break after "self" leaves the word standing alone for a beat before the verdict arrives.
The second stanza keeps the commercial and theatrical vocabulary going. The speaker doesn't "pass" or "live" his time but "spend[s]" it, and "part" now means both a role and a portion. Here the poem's most noticeable habit begins. "A little time," "some little part," "some little violence": the word "little" appears three times in six lines, and "some" keeps company with it, as in "some little part," "some little violence," "some other." The vagueness is deliberate. Everything is reduced and made indefinite, as if the speaker were shrugging. Judging by the way the poem is built, this may be exactly the point: the diminutives sound like modesty, but they also work as an alibi. If the part is little and the violence is little, perhaps nobody has to take much responsibility.
The most telling phrase is "letting fall." The speaker doesn't strike, throw or hurl. He lets violence drop, the way you might let a glove or a crumb slip from your hand. It sounds passive and almost innocent, yet it admits a lack of vigilance. The words "now and then" make the habit sound occasional and forgivable, though anything that recurs is also a pattern. The violence lands on "some other whom I love," and that phrase is the poem's coldest. A loved person is flattened into "some other," as anonymous as the speaker's own self-portrait is thin. The love is real ("whom I love"), but the language around it has gone vague and careless, which is perhaps the poem's whole diagnosis.
Then comes the last line, "as morning bacon," a simile that arrives with no explanation. It can be read two ways, and the line break after "love" allows both. The violence may fall as casually and routinely as breakfast, part of the daily furniture of a household. Or the speaker may love this other person *as* he loves morning bacon, with appetite, habit and a faint hunger to consume. Either way, the choice of bacon matters. It is homely, comforting and fatty, and it is also an animal's body cooked for pleasure, so a quiet violence sits inside the most domestic of comforts. The image makes the poem's argument without stating it. The things we do daily and unthinkingly are the places where cruelty can hide.
The sound patterns are subtle, as they should be in a poem about subtlety. There is no rhyme and no regular meter, only short, conversational lines that move in couplets. The slowness comes from the line breaks, which let phrases like "letting fall" and "some little violence" hang a moment before they land. The b-sounds of "Bit," "business" and "bacon" frame the poem from title to final word, and the hard monosyllables of "thin stuff" give the opening its flat finality.
What makes the poem significant is its scale and its honesty. It avoids grand confession and dramatic villainy and looks instead at the small harm we do over breakfast, in the minor part we play in someone else's life. By ending on a strip of bacon instead of a moral, it leaves readers to feel the discomfort for themselves, and to wonder how often their own "little" words are doing more than they admit.