sometimes happens, that our impressions are so faint and low, that we
cannot distinguish them from our ideas. But notwithstanding this near
resemblance in a few instances, they are in general so very different,
that no-one can make a scruple to rank them under distinct heads, and
assign to each a peculiar name to mark the difference [Footnote 1.].

[Footnote 1. I here make use of these terms, impression and idea, in a
sense different from what is usual, and I hope this liberty will be
allowed me. Perhaps I rather restore the word, idea, to its original
sense, from which Mr LOCKE had perverted it, in making it stand for all
our perceptions. By the terms of impression I would not be understood to
express the manner, in which our lively perceptions are produced in the
soul, but merely the perceptions themselves; for which there is no
particular name either in the English or any other language, that I know
of.]

There is another division of our perceptions, which it will be convenient
to observe, and which extends itself both to our impressions and ideas.
This division is into SIMPLE and COMPLEX. Simple perceptions or
impressions and ideas are such as admit of no distinction nor separation.
The complex are the contrary to these, and may be distinguished into
parts. Though a particular colour, taste, and smell, are qualities all
united together in this apple, it is easy to perceive they are not the
same, but are at least distinguishable from each other.

Having by these divisions given an order and arrangement to our objects,
we may now apply ourselves to consider with the more accuracy their
qualities and relations. The first circumstance, that strikes my eye, is
the great resemblance betwixt our impressions and ideas in every other
particular, except their degree of force and vivacity. The one seem to be