This book is a study on the nature and effects of the Theravada Buddhist religious experiences of the four supramundane fruits of the Noble Eightfold Path - the experience of the fruit which is stream-entry, once returning, non-returning and Arahanthship - with special focus on the experience of stream-entry. It represents the first time within Theravada Buddhist studies that a serious textual study has been combined with a substantial field research. Despite disciplinary rules which virtually prohibit a monk with higher ordination from discussing their personal religious experiences, this book presents seven comprehensive anonymous interviews conducted mainly with forest monks on their meditative experiences. The study presents a definition for the 'supramundane fruit' of the path and an alternate framework to discuss and evaluate Theravada Buddhist religious experiences. It then uses this framework to address some longstanding debates around the Theravada path and its fruits thus bringing experience back to the centre stage of these debates.