4p19d.md (473B)
1 The knowledge of good and evil is (IV. viii.) the 2 emotion of pleasure or pain, in so far as we are conscious 3 thereof; therefore, every man necessarily desires what he thinks 4 good, and shrinks from what he thinks bad. Now this appetite is 5 nothing else but man's nature or essence (Cf. the Definition of 6 Appetite, III. ix. note, and Def. of the Emotions, i.). 7 Therefore, every man, solely by the laws of his nature, desires 8 the one, and shrinks from the other, &c. Q.E.D. 9 10