E3P44D
Demonstration — Part III
Latin
Eodem modo procedit ac propositionis 38 hujus. Nam qui rem quam odit sive quam cum tristitia contemplari solebat, amare incipit, eo ipso quod amat, lætatur et huic lætitiæ quam amor involvit (vide ejus definitionem in scholio propositionis 13 hujus) illa etiam accedit quæ ex eo oritur quod conatus amovendi tristitiam quam odium involvit (ut in propositione 37 hujus ostendimus) prorsus juvatur concomitante idea ejus quem odio habuit tanquam causa.
English (Elwes 1883)
The proof proceeds in the same way as Prop. xxxviii. of this Part: for he who begins to love a thing, which he was wont to hate or regard with pain, from the very fact of loving feels pleasure. To this pleasure involved in love is added the pleasure arising from aid given to the endeavour to remove the pain involved in hatred (III. xxxvii.), accompanied by the idea of the former object of hatred as cause.
Modern English
The proof proceeds in the same way as for P38 of this Part. He who begins to love something that he used to hate or to regard with sadness feels joy from the very fact of loving. To the joy that love involves (E3P13S) is added the joy arising from the fact that the striving to remove the sadness that hatred involves (E3P37) is wholly aided, accompanied by the idea of the formerly hated person as its cause.