Plot, rules, nor even poetry, are not half so great beauties in tragedy or comedy as a just imitation of nature, of character, of the passions and their operations in diversified situations.

Walpole is arguing for a dramatic aesthetic grounded less in formal contrivance than in psychological and social truth. In his view, the chief “beauty” of tragedy or comedy is not ingenious plot mechanics, adherence to rules, or even elevated poetic language, but the convincing representation of human nature—recognizable character, credible passions, and the way emotions play out across varied circumstances. The remark aligns with an eighteenth-century shift away from rigid neoclassical prescriptions toward a more observational, “natural” drama, where authenticity of behavior and feeling becomes the standard of excellence. It also implies that theatrical art succeeds when it enlarges our understanding of people rather than merely displaying technical virtuosity.