lvi.), and that men may be differently affected by one and the same object (III.

li.), and to this extent differ in nature; lastly, that one and the same man may be differently affected towards the same object, and may therefore be variable and inconstant.

Q.E.D.
PROP.XXXIV.

In so far as men are assailed by emotions which are passions, they can be contrary one to another.
Proof .-- A man, for instance Peter, can be the cause of Paul's feeling pain, because he (Peter) possesses something similar to that which Paul hates (III.

xvi.), or because Peter has sole possession of a thing which Paul also loves (III.xxxii.