Essay Concerning Human Understanding was written by John Locke and published in 1689.
Read a brief overview of the work, or chapter by chapter summaries.
- Book I: Attack on Innate Knowledge
- Book II chapter i-vii: Simple Ideas
- Book II, chapter viii: Primary and Secondary Qualities
- Book II, chapters ix-xi: Faculties of the Mind
- Book II, chapters xii-xxi: Complex Ideas of Modes
- Book II, chapter XXIII: Ideas of Substances
- Book II, chapters xxiv-xxvi: Ideas of Relation
- Book II, chapters xxix-xxxii: Other Ways to Classify Ideas
- Book III, chapter iii, sections 1-9: General Terms
- Book III, Chapters iii-v: Sorts
- Book III, Chapters vii-xi: More on Language
- Book IV, Chapters i and ii: What Knowledge Is
- Book IV, Chapter iii-viii: Knowledge of the Nature of Things
- Book IV, Chapter ix-xi: Knowledge of the Existence of Things
- Book IV, Chapters xii-xxi: Judgment or Opinion
Find the quotes you need to support your essay, or refresh your memory of the book by reading these key quotes.