In the Chinese intellectual tradition, King Wu's military expedition and Bo Yi's (and Shu Qi's) objection to it were well known. King Wu had been admired in that he saved people by dethroning the tyrant King Zhou. At the same time, Bo Yi and Shu Qi also had been praised for their loyalty to that same dynasty. These seemingly contradictory evaluations open a window on how unity can be conceived in Neo-Confucianism, particularly when one is faced with the possibility of colliding values. By examining the debate between Wang Yangming (1472-1529) and Zhan Ruoshui (1466-1560) over such a complex political issue, this article aims to unravel various tensions embedded in Neo-Confucian political philosophy.