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Now what it is, and how characterised, will be more plain if we

take up the subject afresh.

An act of Sight is thought to be complete at any moment; that is

to say, it lacks nothing the accession of which subsequently will

complete its whole nature.

Well, Pleasure resembles this: because it is a whole, as one may

say; and one could not at any moment of time take a Pleasure

whose whole nature would be completed by its lasting for a longer

time.