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143

SECTION XI.

Of Sight.

lN O doubt but our ideas of the manner in which Vision
is performed, as of all other such exquisite subjects, must
be very imperfect.

But what we appear to know of it is so remarkably cu-
rious : the Eye is such a wonderful part of our frame, that
to understand a little of this surprizing operation, will cer-
tainly invite to particular notice, and occasion more plea-
sure than is commonly received from Sight.

We appear to see as if Sight went from the eye to the
object; we are said to look as far as the horizon, or up
to the firmament, conveying an idea that Sight goes
forward from us.

, But seeing is a passive state, Vision is accomplished by
opening the eye-lids, at least this is the only performance
we are capable of towards it. We cannot, have not the
power to look out, by Sight to reach an object. We
see by other means. We do but receive all the appear-
ances that surround us. All that we are sensible of comes
 
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