This edition of John Locke's landmark work on epistemology and philosophy of mind includes Books II and IV, as well as a selection of omitted passages from the original text. Locke's ideas on perception, knowledge, and identity have had a profound influence on modern philosophy, and this edition provides a valuable introduction to his ideas. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.