A Treatise Concerning the Principles of Human Knowledge

A philosophical treatise written in the early 18th century. The work explores the foundations of human knowledge, particularly questioning the nature of existence and the perceivable reality, focusing on ideas and their connection to the perceiving mind. The opening of the treatise sets the stage for Berkeley's inquiry into the principles of human knowledge, highlighting the contradictions and difficulties that arise from traditional philosophical thought. Berkeley challenges the notion that material objects exist independently of perception and argues that what we consider real is intrinsically tied to our experiences and ideas. He enunciates his aim to investigate and clarify the sources of skepticism and misunderstandings in philosophy, suggesting that many errors stem from the flawed assumption of abstract ideas divorced from direct sensory experience. The introduction serves as a foundation for Berkeley's key thesis: the existence of things is inherently linked to being perceived, a concept he seeks to thoroughly investigate throughout the text.