A writer criticising another group may quote that group’s words. The quotation is valuable, but it arrives inside a work with its own argument. Read both layers before treating the excerpt as a complete statement of the quoted position.
Mark where the quotation begins and ends
Use the edition’s conventions to identify the quoted material and the surrounding commentary. If the boundary is uncertain, keep that uncertainty visible. Modern quotation marks may reflect an editorial decision that the notes explain.
Ask what the surrounding author is trying to demonstrate. Are they answering a claim, giving an example, or presenting something they expect the reader to reject? That purpose affects how the excerpt is introduced and followed.
Check for an independent witness
If the edition identifies another surviving source for the passage, compare it carefully. Note differences in wording or extent without assuming immediately that one version is deceptive. The relationship may require specialist explanation.
When writing a note, attribute both the quotation and its immediate setting. “This author presents these words as an opponent’s claim” is more precise than treating the excerpt as an unmediated voice. The goal is to preserve evidence while recognising the route by which it has reached the reader.