The term "deterioration" is employed in literature as a multifaceted metaphor for decline, capturing not only physical decay but also moral and intellectual degradation. Authors use it to depict the gradual fading of noble qualities or social order, as when a ruler’s inherent virtues falter with fatal consequences [1] or when an individual undergoes a moral atrophy [2]. It is similarly applied to describe the weakening of physical and mental faculties—in some works, even the senses or memory show evidence of decline [3, 4]. At the same time, literature contrasts this inevitable process with idealized states of permanence, where certain beings or qualities are portrayed as immune to decay [5, 6], thus enriching the concept with both a sense of tragic decline and a subtle hope for resilience or renewal.