This book contains a selection of texts written by the Rabbi and Vienna Circle member Josef Schächter after his emigration to Palestine/Israel. These are the most relevant of those texts dealing with the Vienna Circle and its method. They were mostly written in Hebrew and are here available in English for the first time. Schächter’s writings are supplemented by a transcript of an interview with him, a report by his grandson Asher Schechter, and further documentation of relevance.