 As in early  Mohist thought,  the core of the later Mohist ethical theory is a cluster of four interrelated concepts: “Morality” (yì 義, also “duty” or “right”), “benefit” (lì 利, perhaps also “welfare”), “benevolence” (rén 仁, also “kindness” or “humaneness”), and “care” (ài 愛). These notions are explicated more precisely than in the earlier texts, and they are fleshed out in ways that seem intended to rectify weaknesses in earlier Mohist ethics. 