E4Cap19
Chapter — Part IV
Latin
Amor præterea meretricius hoc est generandi libido quæ ex forma oritur et absolute omnis amor qui aliam causam præter animi libertatem agnoscit, facile in odium transit nisi, quod pejus est, species delirii sit atque tum magis discordia quam concordia fovetur. Vide scholium propositionis 31 partis III.
English (Elwes 1883)
Again, meretricious love, that is, the lust of generation arising from bodily beauty, and generally every sort of love, which owns anything save freedom of soul as its cause, readily passes into hate; unless indeed, what is worse, it is a species of madness; and then it promotes discord rather than harmony (cf. III. xxxi. Coroll.).
Modern English
Meretricious love — that is, sexual desire arising from bodily appearance — and in general any love that acknowledges no cause other than freedom of mind, easily turns to hatred; unless, which is worse, it is a form of madness, in which case it fosters discord rather than harmony. See the Corollary of Proposition 31 of Part III (E3P31C).