Source: Intelligence and How to Get It: Why Schools and Cultures Count (2009). p. 49.
Second, the Confucian tradition, of which Japan and Korea are a part, has little use for the idea that knowledge is valuable for its own sake. This starkly contrasts with the ancient Greek philosophical tradition, which prized such knowledge above all other kinds. (I emphasize the term philosophical tradition in the preceding sentence. There is an amusing passage in The Republic where an Athenian businessman castigates Socrates for his pursuit of abstract knowledge, telling him that although it is admittedly attractive in the young, it is disgusting in a grown man. [Emboldening mine])
Where in the Republic does an Athenian businessman castigate "Socrates for his pursuit of abstract knowledge"?