“Instead of viewing morality as a system of principles to be grasped by the detached intellect, and emotions as motivations that either support or subvert our choice to act according to principle, we will have to consider emotions as part and parcel of the system of ethical reasoning. We cannot plausibly omit them, once we acknowledge that emotions include in their content judgments that can be true or false, and good or bad guides to ethical choice. We will have to grapple with the messy material of grief and love, anger and fear, and the role these tumultuous experiences play in thought about the good and the just.”

– Martha Nussbaum, Upheavals of Thought