Offering a description of the nature of mind and how it functions, this introduction to traditional Buddhist psychology guides readers through the Abhidharma classification of positive and negative mental states. The author was born in England, travelled to India as a young man, was ordained as a Buddhist monk, and has been writing about and teaching Buddhism for more than four decades. In this book he explores the part individuals play in creating their own suffering and happiness, describes the relationship of the mind to karma and rebirth, and stresses the ethical, other-regarding nature of Buddhist psychology.