4p33d.md (626B)
1 The nature or essence of the emotions cannot be explained 2 solely through our essence or nature (III. Deff. i., ii.), but 3 it must be defined by the power, that is (III. vii.), by the 4 nature of external causes in comparison with our own; hence it 5 follows, that there are as many kinds of each emotion as there 6 are external objects whereby we are affected (III. lvi.), and 7 that men may be differently affected by one and the same 8 object (III. li.), and to this extent differ in nature; lastly, 9 that one and the same man may be differently affected towards 10 the same object, and may therefore be variable and 11 inconstant. Q.E.D. 12 13