William Judge is known as one of the central figures of the early school of Theosophy- his works were numerous, but it is perhaps "Epitome..." which contains the most advanced, yet general, overview of some of the beliefs therein. Judge delves into reincarnation, devachan, various eastern concepts and terms, and expounds his beliefs and those of Theosophy within this work. Upon these principles, such spiritual systems have flourished, as the west adopts and adapts eastern systems for use.