Reply Obj. 3: The things in which we take pleasure, since they are the objects of pleasure, cause not only a material, but also a formal difference, if the formality of pleasurableness be different. Because difference in the formal object causes a specific difference in acts and passions, as stated above (Q. 23, AA. 1, 4; Q. 30, A. 2). ________________________
QUESTION 32
OF THE CAUSE OF PLEASURE
(In Eight Articles)
We must now consider the causes of pleasure: and under this head there are eight points of inquiry:
(1) Whether operation is the proper cause of pleasure?
(2) Whether movement is a cause of pleasure?
(3) Whether hope and memory cause pleasure?
(4) Whether sadness causes pleasure?
(5) Whether the actions of others are a cause of pleasure to us?
(6) Whether doing good to another is a cause of pleasure?