E3DA20
Definition of an Emotion — Part III
Latin
Indignatio est odium erga aliquem qui alteri malefecit.
Explicatio: Hæc nomina ex communi usu aliud significare scio. Sed meum institutum non est verborum significationem sed rerum naturam explicare easque iis vocabulis indicare quorum significatio quam ex usu habent, a significatione qua eadem usurpare volo, non omnino abhorret, quod semel monuisse sufficiat. Cæterum horum affectuum causam vide in corollario I propositionis 27 et scholio propositionis 22 hujus partis.
English (Elwes 1883)
Indignation is hatred towards one who has done evil to another.
Explanation: I am aware that these terms are employed in senses somewhat different from those usually assigned. But my purpose is to explain, not the meaning of words, but the nature of things. I therefore make use of such terms, as may convey my meaning without any violent departure from their ordinary signification. One statement of my method will suffice. As for the cause of the above--named emotions see III. xxvii. Coroll. i., and III. xxii. note.
Modern English
Indignation is hatred toward someone who has done harm to another.
I am aware that these terms are commonly used to mean something different. But my aim is to explain the nature of things, not the meanings of words, and to indicate things by terms whose ordinary meaning does not depart too far from the sense in which I intend to use them. One statement of this will suffice. For the cause of these affects, see Corollary 1 of Proposition 27 and the Scholium of Proposition 22 of this Part (E3P27C1) (E3P22S).