E3P27D4
Demonstration — Part III
Latin
Id quod rem cujus nos miseret, tristitia afficit, nos simili etiam tristitia afficit (per propositionem præcedentem) adeoque omne id quod ejus rei existentiam tollit sive quod rem destruit, comminisci conabimur (per propositionem 13 hujus) hoc est (per scholium propositionis 9 hujus) id destruere appetemus sive ad id destruendum determinabimur atque adeo rem cujus miseremur, a sua miseria liberare conabimur. Q.E.D.
English (Elwes 1883)
That, which painfully affects the object of our pity, affects us also with similar pain (by the foregoing proposition); therefore, we shall endeavour to recall everything which removes its existence, or which destroys it (cf. III. xiii.); in other words (III. ix. note), we shall desire to destroy it, or we shall be determined for its destruction; thus, we shall endeavour to free from misery a thing which we pity. Q.E.D.
Modern English
What causes sadness to the thing we pity also causes us a similar sadness (E3P27). We will therefore strive to recall everything that removes the existence of that thing, or that destroys it (E3P13), that is, by E3P9S (E3P9S), we will desire to destroy it, or be determined toward its destruction. So we will strive to free from its misery the thing we pity. Q.E.D.