Final answer:
The missing word in the aphorism by Franklin is 'educate,' emphasizing the importance of continual self-education and personal growth, which aligns with the philosophies of Socrates and Confucius.
Step-by-step explanation:
This aphorism by Franklin infers that it's okay to not know something, but shameful to not want to educate oneself. Benjamin Franklin's wisdom holds a deep truth about personal growth and knowledge. In line with this, the principle of knowing oneself and recognizing the limits of one's knowledge is echoed in various teachings, including Socrates's advice and the venerable aphorisms of the oracle at Delphi, which encourage self-examination and the seeking of truth. To not want to educate oneself indicates a refusal to grow and to remain stagnant in both personal and intellectual domains. Moreover, Confucius emphasizes the importance of continual learning and self-improvement, suggesting that the acquisition of knowledge and the refinement of the self are lifelong pursuits that contribute significantly to personal development and societal betterment.