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The Idea of Succession not from Motion.       §6. Thus by reflecting on the appearing of various Ideas, one after
another in our Understandings, we get the Notion of Succession; which if
any one should think, we did rather get from our Observation of
Motion by our Senses, he will, perhaps, be of my Mind, when he
considers, that even Motion produces in his Mind an Idea of
Succession, no otherwise than as it produces there a continued
train of distinguishable Ideas. For a Man looking upon a Body really
moving, perceives yet no Motion at all, unless that Motion produces
a constant train of successive Ideas. v.g. a Man becalmed at Sea, out of
sight of Land, in a fair Day, may look on the Sun, or Sea, or Ship,
a whole hour together, and perceive no Motion at all in either;
though it be certain, that two, and perhaps all of them, have
moved, during that time, a great way: But as soon as he perceives
either of them to have changed distance with some other Body, as
— 184 —
soon as this Motion produces any new Idea in him, then he per-
ceives, that there has been Motion. But where-ever a Man is, with
all things at rest about him, without perceiving any Motion at all;
if during this hour of quiet he has been thinking, he will perceive
the various Ideas of his own Thoughts in his own Mind, appearing
one after another, and thereby observe and find Succession, where
he could observe no Motion.
Locke Hum II, 14, §6, pp. 183-184