A Treatise Concerning the Principles of Human Knowledge
George Berkeley
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Berkeley's 1710 argument that the external world is made of ideas, not material substance. He begins by saying the mind cannot form abstract ideas, then claims that to exist is to be perceived by a mind. What we call things are collections of ideas, and the regularity of experience comes from God, not from matter. He sets out to refute John Locke and defends the position against scepticism and atheism. Only Part I was ever published, and Part II never appeared.
Where it happens

- Dysart Castle, County Kilkenny Berkeley's birthplace, near Thomastown.2
- Trinity College Dublin Where Berkeley took his B.A. in 1704 and M.A. in 1707.2
- Cloyne, County Cork His diocese as bishop from 1734 to 1753.2
- Middletown, Rhode Island Site of Whitehall, Berkeley's home in America.2
- Oxford Where Berkeley died and is buried in Christ Church Cathedral.2
Through time
- 1685George Berkeley is born on 12 March.2
- 1709Berkeley publishes An Essay Towards a New Theory of Vision.2
- 1710The Treatise Concerning the Principles of Human Knowledge appears; Part II is never published.12
- 1713Berkeley rewrites his case as Three Dialogues Between Hylas and Philonous.2
- 1734Berkeley becomes Bishop of Cloyne and publishes The Analyst.2
- 1753Berkeley dies in Oxford on 14 January.2
Who is in it, and behind it
Isaac Newton subject
Berkeley later argued against his absolute space, time and motion in De Motu.2
Immanuel Kant subject
One of the later thinkers deeply influenced by Berkeley's works.2
David Hume subject
Another later thinker influenced by Berkeley.2
Arthur Schopenhauer subject
Called Berkeley the father of idealism.2
What it is about
In its own words
we have first raised a dust and then complain we cannot see. 4. My purpose therefore is, to try if I can discover what those Principles are which have introduced all that doubtfulness and uncertainty, those absurdities and contradictions, into the several sects of philosophy; insomuch that the wisest
framing ABSTRACT IDEAS or notions of things. He who is not a perfect stranger to the writings and disputes of philosophers must needs acknowledge that no small part of them are spent about abstract ideas
Nothing seems of more importance towards erecting a firm system of sound and real knowledge, which may be proof against the assaults of Scepticism, than to lay the beginning in a distinct explication of what is meant by thing, reality, existence; for in vain shall we dispute concerning the real exist
Their ESSE is PERCIPI, nor is it possible they should have any existence out of the minds or thinking things which perceive them
I do not argue against the existence of any one thing that we can apprehend either by sense or reflexion
MATTER INVOLVES A CONTRADICTION.--Some there are who make a DISTINCTION betwixt PRIMARY and SECONDARY qualities
The shape of the book
5 chapters, 37,157 words. Point at a bar.
How it came to be here
George Berkeley, an Anglo-Irish philosopher and later Bishop of Cloyne, published the Treatise in 1710, a year after his Essay Towards a New Theory of Vision. After its poor reception he rewrote the argument in dialogue form as Three Dialogues between Hylas and Philonous in 1713. Berkeley is regarded as the founder of immaterialism, later called subjective idealism, and his work influenced Kant and Hume. The site carries the Project Gutenberg text with Berkeley's preface and introduction.
Free to read elsewhere
- Project Gutenberg ebook #4723
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Sources
- A Treatise Concerning the Principles of Human Knowledge (Wikipedia)
- George Berkeley (Wikipedia)
- A Treatise Concerning the Principles of Human Knowledge by George Berkeley (Project Gutenberg)
Text: PG 4723; edition year not stated. Standard Ebooks page for 'The Principles of Human Knowledge' says not in catalogue yet. US public domain (Project Gutenberg licence).
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