“Professor Y. Karunadasa, a leading living authority on Theravada Abhidhamma, clarifies this ancient philosophy and brings it within the reach of students pursuing both religious and philosophical studies. Professor Karunadasa’s characteristic clarity of thinking makes this a lucid exposition of the core doctrinal tenets of the Theravada Abhidhamma. It is of course true that it is the nature of conditioned reality that this work seeks to expound. However, as Buddhism stresses, it is by penetrating the nature of conditioned reality that the unconditioned reality of nibbana can be realized.” (Asanga Tilakaratne, (formerly) Senior Chair, Professor of Pali and Buddhist Studies, University of Colombo, Sri Lanka.)