Principles of Human KnowledgeGeorge BerkeleyRead freeBuy on AmazonAppears in 5 ideasMetaphysicsMatterWhat is matter, the stuff of the physical world, and how does it relate to form, mind, and change?EpistemologyIdeaWhat is an idea, and how does it relate to the things we claim to know?SenseWhat do the senses contribute to knowledge, and where do they fall short?Sign and SymbolHow do signs and symbols carry meaning, and what is the relation between words, ideas, and things?Logic & MethodUniversal and ParticularDo universals exist independently of particular things, or are they only names we apply to collections of similar individuals?