In other words, Pleasure or Pain arising from the image of something concerning which we have hoped or feared.
Again, Joy is Pleasure arising from the image of something past whereof we have doubted the issue.

Disappointment is the Pain opposed to Joy.
[5] Conscientiae morsus--thus rendered by Mr.Pollock.
PROP.XIX.

He who conceives that the object of his love is destroyed will feel pain; if he conceives that it is preserved he will feel pleasure.
Proof .-- The mind, as far as possible, endeavours to conceive those things which increase or help the body's power of activity (III.

xii.); in other words (III.xii.

note), those things which it loves.