i.) of a variety of individual parts of different nature, and may therefore (Ax.i.after Lemma iii.
after II.

xiii.) be affected in a variety of different ways by one and the same body; and contrariwise, as one and the same thing can be affected in many ways, it can also in many different ways affect one and the same part of the body.

Hence we can easily conceive, that one and the same object may be the cause of many and conflicting emotions.
PROP.XVIII.A man is as much affected pleasurably or painfully by the image of a thing past or future as by the image of a thing present.
Proof .-- So long as a man is affected by the image of anything, he will regard that thing as present, even though it be non--existent (II.xvii.and Coroll.), he will not conceive it as past or future, except in so far as its image is joined to the image of time past or future (II.xliv.

note).

Wherefore the image of a thing, regarded in itself alone, is identical, whether it be referred to time past, time future, or time present; that is (II.xvi.