E3P41S
Scholium — Part III
Latin
Quod si se justam amoris causam præbuisse crediderit, gloriabitur (per propositionem 30 hujus cum ejusdem scholio) quod quidem (per propositionem 25 hujus) frequentius contingit et cujus contrarium evenire diximus quando aliquis ab aliquo se odio haberi imaginatur (vide scholium propositionis præcedentis). Porro hic reciprocus amor et consequenter (per propositionem 39 hujus) conatus benefaciendi ei qui nos amat quique (per eandem propositionem 39 hujus) nobis benefacere conatur, gratia seu gratitudo vocatur atque adeo apparet homines longe paratiores esse ad vindictam quam ad referendum beneficium.
English (Elwes 1883)
If he believes that he has given just cause for the love, he will take pride therein (III. xxx. and note); this is what most often happens (III. xxv.), and we said that its contrary took place whenever a man conceives himself to be hated by another. (See note to preceding proposition.) This reciprocal love, and consequently the desire of benefiting him who loves us (III. xxxix.), and who endeavours to benefit us, is called gratitude or thankfulness. It thus appears that men are much more prone to take vengeance than to return benefits.
Modern English
If he believes he gave just cause for the love, he will take pride in it (E3P30). This happens more often (E3P25), and we said the contrary occurs when someone imagines himself hated by another (see the scholium to the preceding proposition). This reciprocal love, and consequently the *conatus* to benefit the one who loves us (E3P39) and who in turn strives to benefit us (E3P39), is called gratitude or thankfulness. It thus appears that people are far more ready to seek revenge than to return a benefit.