This technique of alternating the different voices forms a kind of chorus. The novel is a polyphonic novel, that is, a novel without a governing central monologic voice of narration. There is no narrator per se. Each voice performs its own contribution to the novel. In the dialogic or polyphonic novel, everything is understood as part of the whole.
Nothing exists in isolation.
The distinction between a sentence and a Bakhtinian utterance is important in The Waves . Sentences are repeatable, but each utterance is unique. The context surrounding a particular sentence is never exactly the same, and the meaning is unique to that occurrence, although the repetition of the sentence may appear to suggest a pattern. It stamps, and stamps, and stamps. Louis will repeat this sentence, or similar ones, on p. 58 and again on p. 67.