He Who Learns But Does Not

From Analects Book II, Chapter 15 — one of the most quoted passages in the Confucian canon. The original Chinese (學而不思則罔，思而不學則殆) sets up a direct tension: learning without reflection leads to confusion; reflection without learning leads to danger. For Confucius, study and thought were inseparable disciplines. He likely directed these words at two types of students he observed: those who accumulated facts without examining them, and those who theorized without grounding themselves in the classics.