This book develops an integrated perspective on human knowledge, extending ideas from cognitive science and the philosophy of science to address fundamental problems concerning human action in the world and the question of whether the space-time world exhausts all that there is of reality. It is a question of reconciling a theory of the construction of reality by the individual through systems of schemas or mental representations with an explanation of the social construction of language, science, ideology and religion. At the same time, many current debates and research in philosophy, linguistics, artificial intelligence, brain theory, cognitive science, evolutionary biology, social anthropology, history of religions, theology, and biblical and literary criticism are taken into account. However, the reader will not find here a discouraging mixture but a cumulative gathering of evidence for a coherent and integrated view of the individual and social dimensions of human knowledge.