Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog Project Gutenberg 2016-12-06 Public domain in the USA. 520 Newcastle, Margaret Cavendish, Duchess of 1674 Cavendish, Margaret, Duchess of Newcastle Lucas, Margaret Philosophical Letters: or, modest Reflections upon some Opinions in Natural Philosophy Produced by Clare Graham and Marc D'Hooghe at Free Literature (online soon in an extended version, also linking to free sources for education worldwide ... MOOC's, educational materials,...) Images generously made available by the Internet Archive. "Philosophical Letters: or, Modest Reflections Upon Some Opinions in Natural Philosophy" by the Lady Marchioness of Newcastle is a philosophical treatise written in the mid-17th century. The work presents a series of letters that critique various prominent philosophical ideas, particularly those of figures such as Descartes and Hobbes. The author aims to explore and communicate her unique perspectives on natural philosophy, emphasizing her belief in the dual existence of sensitive and rational life across all creatures. The opening of the letters sets the stage for a dialogue on philosophical issues, with the Marchioness expressing both trepidation and determination in addressing established thinkers. She asserts her right to challenge prevailing notions and assert her insights, particularly her views on the nature of matter, perception, and the soul's relationship with the body. Notably, she argues for the validity of her opinions while acknowledging the contributions of other philosophers, highlighting a commitment to the pursuit of truth rather than mere contradiction. The letters serve not only as a defense of her ideas but as an invitation for further discussion in the realm of natural philosophy, demonstrating her intellectual vigor and dedication to understanding the complexities of existence. (This is an automatically generated summary.) Reading ease score: 21.8 (College graduate level). Very difficult to read. en Philosophy Newcastle, William Cavendish, Duke of, 1592-1676 PR Text Category: Essays, Letters & Speeches Category: History - Early Modern (c. 1450-1750) Category: Philosophy & Ethics 979716 2025-08-21T11:12:24.774885 text/html 961929 2024-10-23T01:29:13 text/html 558546 2025-08-21T11:12:33.967819 application/epub+zip 577311 2025-08-21T11:12:25.966842 application/epub+zip 404096 2025-08-21T11:12:25.345901 application/epub+zip 848875 2025-08-21T11:12:40.220814 application/x-mobipocket-ebook 782800 2025-08-21T11:12:33.312835 application/x-mobipocket-ebook 609607 2022-09-24T11:53:08.631456 application/x-mobipocket-ebook 890191 2025-08-21T11:12:23.393926 text/plain; charset=us-ascii 870066 2024-10-23T01:29:13 text/plain; charset=us-ascii 17028 2025-08-21T11:12:40.379777 application/rdf+xml 19315 2025-08-21T11:12:25.477829 image/jpeg 3161 2025-08-21T11:12:25.412830 image/jpeg 553888 2025-08-21T11:12:24.848868 application/octet-stream application/zip en.wikipedia