​【說明】

湯川秀樹在1966年曾發表隨筆〈知魚樂〉，自述書寫的契機，並闡明他對典故的理解。他認為，惠子展現「經驗主義」、與傳統科學態度更接近的立場；莊子的思路則近似「理性主義」，秀樹自言更傾向莊子。秀樹也以此典故思索基本粒子物理學，認為雖難以透過實驗直接識別基本粒子的結構細節，但從邏輯上來把握仍是可能的。
 

【Description】

In 1966, Hideki Yukawa published the essay “Knowing the Joy of Fish,” in which he reflected on the occasion of its writing and clarified his reading of the classical anecdote. He interpreted Huizi as representing an empiricist stance, closer to the conventional attitude of science, while viewing Zhuangzi’s position as akin to rationalism—a perspective Hideki himself felt more drawn to.
Through this parable, Hideki contemplated problems in elementary particle physics, suggesting that although the internal structure of fundamental particles may elude direct experimental observation, it can nevertheless be grasped through logical reasoning.