本文藉魯迅文論的兩項觀念，「懸想」與「神思」，重新提請注意五四「文學」意涵，以及當代的回應。這兩項觀念都強調「想像力的政治」：深入現實盡頭的無物之陣，探勘理性以外的幽黯淵源。「神思」與「懸想」在現當代文學主流論述裏一向隱而不彰，卻意外從新世紀的科幻小說獲得共鳴。本文介紹作家韓松小說《醫院》三部曲及其與魯迅作品的隱秘對話。兩者各據百年五四一端，但都觸及「神思」與「懸想」的多重維度，並展開系列辯證：如身體與國體，瘋狂與理性，疾病與醫藥，入魔與除魅。更重要的，兩位作家都藉此叩問書寫與文學的根本意義，及其革命性真諦。

This essay seeks to reassess the meaning of “modern Chinese literature” and its contemporary repercussions by looking into the concepts of “fanciful speculation” and “divine thought” as conceived by Lu Xun. Both concepts stress the politics of imagination that inspires one to think the unthinkable and explore the unexplorable. While the concepts have been obscured by the May Fourth canon of enlightenment and revolution through modern times, they have found an unlikely manifestation in contemporary science fiction. The essay offers a reading of Han Song’s Hospital trilogy in light of Lu Xun’s concepts, and contemplates the dialectics concerning Chinese modernity, such as the body and the nation; disease and medicine; enlightenment and enchantment; and above all, literature and revolution.