3p22d.md (485B)
1 He, who affects pleasurably or painfully the object of 2 our love, affects us also pleasurably or painfully–that is, if we 3 conceive the loved object as affected with the said pleasure or 4 pain (III. xxi.). But this pleasure or pain is postulated to come 5 to us accompanied by the idea of an external cause; therefore 6 (III. xiii. note), if we conceive that anyone affects an object 7 of our love pleasurably or painfully, we shall be affected with 8 love or hatred towards him. Q.E.D. 9 10