Aristotle, and W. Rhys Roberts. Rhetoric. Mineola, NY: Dover, 2004. Kindle Electronic Edition.
Book II, chapter 9
Aristotle compares pity and indignation. We feel indignation in response to unmerited good fortune, as opposed to pity in response to bad fortune (II.9, B1386b). We become indignant with those who receive power or riches undeservingly, especially if they received it recently (II.9, B1387a). The feeling is made stronger when we ourselves deserved the good fortune but did not receive it (II.9, B1387b).