by Ven. Nyanaponika Thera The content of these studies is rather varied: they include philosophical and psychological investigations, references to the practical application of the teachings concerned, pointers to neglected or unnoticed aspects of the Abhidhamma, textual research etc. This variety of contents serves to show that wherever we dig deep enough into that inexhaustible mine, the Abhidhamma literature, we shall meet with valuable contributions to the theoretical understanding and practical realization of Buddhist doctrine.