Interesting twist on empathy from Agnes Callard’s “Open Socrates”:

If empathy is the psychological power to import the feelings of others, it follows that empathy is a prerequisite for revenge. … If this is surprising, that is because we usually use the word “empathy” in a laudatory way that conceals the existence of what we might call “dark empathy.” When I channel your feelings, I can react to those feelings in a way that reverses their valence for you. Thus, I can empathetically import your joy, and be pained by it (envy), or empathetically import your suffering, and be pleased by it (Schadenfreude). … But there is a common ground: all forms of empathy, be they dark or heartwarming, begin with my feeling what you feel. Empathy is not a virtue, but a power. Almost every adult has this power to some degree, though some of us have more of it than others, and it can be used for good or ill.