Principles of Philosophy (book)

"Principles of Philosophy," written by René Descartes, is a foundational work in Western philosophy that aims to establish a clear understanding of knowledge and the nature of reality. Descartes introduces the method of doubt to identify indubitable truths, famously stating "I think, therefore I am." The book explores the distinction between mind and body, the existence of God, and the nature of physical matter. It laid the groundwork for scientific reasoning and modern philosophy by emphasizing rational inquiry, systematic doubt, and the pursuit of certain knowledge about the universe.