— 184 —
      §8. On the contrary, things that move so swift, as not to affect the
Senses distinctly with several distinguishable distances of their
Motion, and so cause not any train of Ideas in the Mind, are not also
perceived to move. For any thing, that moves round about in a Circle,
in less time than our Ideas are wont to succeed one another in our
Minds, is not perceived to move; but seems to be a perfect, entire
Circle of that Matter, or Colour, and not a part of a Circle in
Motion.
Locke Hum II, 14, §8, p. 184