Perception is "a kind of drama, wherein some things are performed behind the scenes, others are represented to the mind in different scenes, one succeeding the another"
An Inquiry into the Human Mind on the Principles of Common Sense
<u>An Inquiry into the Human Mind, on the Principles of Common Sense. By Thomas Reid, D. D. Professor of Philosophy in King's College, Aberdeen</u> (Edinburgh: Printed for A. Millar and A. Kincaid & J. Bell, 1764). &lt;<a href="http://find.galegroup.com/ecco/infomark.do?&source=gale&prodId=ECCO&userGroupName=viva_uva&tabID=T001&docId=CW117422497&type=multipage&contentSet=ECCOArticles&version=1.0&docLevel=FASCIMILE">Link to ECCO</a>&gt;
The third edition is available in Google Books &lt;<a href="http://books.google.com/books?id=v-IsAAAAYAAJ">Link</a>&gt;<br>
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See also fourth edition of 1785, which serves as the copy text for Derek Brookes' critical edition published by The Pennsylvania State University Press, 1997.