This book is an exploration of human understanding, from the perspectives of psychology, philosophy, biology and theology. The six contributors, among the most internationally eminent in their fields, are: Lynne Rudder Baker, Professor of Philosophy, University of Massachusetts; Brian Hebblethwaite, lectured in the Philosophy of Religion, University of Cambridge; Phillip Johnson-Laird FRS, Professor of Psychology, Princeton University; George Lakoff, Professor of Linguistics, University of Berkeley; Michael Ruse, Professor of Philosophy, Florida State University; Anthony J. Sanford FBPsS, Professor of Psychology, University of Glasgow. Though scholarly, the writing is non-technical. No background in psychology, philosophy or theology is presumed. No other interdisciplinary work has undertaken to explore the nature of human understanding. This book is unique, and highly significant for anyone interested in or concerned about the human condition.