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Duke Ling of Wei asked Confucius about military formations. Confucius replied, “I have heard about matters of ritual vessels and sacrifices; as for military affairs, I have never studied them.” The next day, he left Wei.
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Nangong Kuo asked Confucius, “Yi was skilled in archery, and Ao could overturn boats with his strength – yet neither died a natural death. Yu and Ji personally tilled the fields, yet they gained the empire.”