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And this is one reason why Pleasures are thought to differ in

kind, because we suppose that things which differ in kind must be

perfected by things so differing: it plainly being the case with

the productions of Nature and Art; as animals, and trees, and

pictures, and statues, and houses, and furniture; and so we

suppose that in like manner acts of Working which are different

in kind are perfected by things differing in kind. Now

Intellectual Workings differ specifically from those of the

Senses, and these last from one another; therefore so do the

Pleasures which perfect them.