Within any discipline of study, the acquisition of new knowledge is a primary goal. Theorists and researchers throughout academia seek to expand the body of knowledge associated with their discipline. Philosophers likewise aim for knowledge acquisition but are also concerned with the nature of knowledge itself. What is knowledge? Is there a limit to what we can know? How can we increase our knowledge without first understanding what knowledge is? Epistemology is the field within philosophy that focuses on questions pertaining to the nature and extent of human knowledge. This chapter seeks to provide a general understanding of the discipline of epistemology.