This books deals with one of the greatest puzzles of the universe, i.e. “The Ontology and Nature of Knowledge” which has long been a matter of considerable controversies among the Western and Muslim Philosophers. Having critically examined the viewpoints of Western and Muslim philosophers regarding the ontology of knowledge, the author proposes his own theory on perception called “The Reversion Theory” in part I. Discussing the issue of Mind, body, and mental qualities from the perspectives of monistic theories including Behaviorism, Functionalism, and the Correspondence Theory in one hand, and the dualistic theories of Plato, Aristotle, Avicenna (IbnSīnā), and MullaSadra on the other, the book deals in details with the “Spirit and its nature” as a very significant issue. Reconsidering the dualistic theories and critically examining the monistic ones, The “Reversion Theory” presents a novel view on perception and seeks to propose new ideas regarding such significant epistemological problems as the sense perception, generalities’ ontology, the nature of thinking, the error of reasoning, the awareness, and the essence of memory and imagination within this novel theoretical framework. The second part of the book deals with the reconsideration of the epistemology, investigating the tripartite elements of knowledge as “True Justified Belief”. Having criticized such theories as correspondence, coherence, and pragmatism, a new theory called “The Theory of Common Sense in Truth” is proposed within the framework of Reversion Theory. Moreover, the book defends “The Theory of Common Sense in Justification” after reviewing the tenets of Foundationalism and Coherentism. “Epistemology” is undoubtedly an important step in proper understanding of mingling knowledge and religion on the one hand and systematic production of religious knowledge on the other.

Born in 1972 in Mashhad, Iran, Mohsen Abbasnejad was took his BS in Mechanical Engineering but continued his studies in Philosophy. Having studied Islamic Jurisprudence and Usool in seminary under the late Ayatollah Mirza Ali Falsafi, a great contemporary jurist, and Philosophy under the late Sayyed Jalal Ashtiani, a distinguished philosopher of the Eastern World, he passed the higest levels of the seminary with flying colors. Having authored number of works in such fields as philosophy, philosophy of science, Modern kalam (literally known as Science of discourse), Quranic sciences and Hadith, and Jurisprudence, Mr. Abbasnejad is now serving as the head of the Department for researching on Quran and Epistemology, and the Director of the Quranic Research Foundation. In addition to authoring a six-volume collection on the basics of inter-relating science and the faith, some of his other works are as follows: • Principles and basics of the Quran and Modern Sciences • Imam Ali (A.S) Managerial Approach • Imam Ali (A.S) Personal lifestyle • Basic rights within religious approach • Some elaborations on the Principles of Islamic Jurisprudence (3 volumes).