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Karma has been described in great detail. A very subtle and profound analysis of karma is found in the Jain Agamas and subsequent texts. Being in Prakrit and Sanskrit languages, it is indeed meant for scholars, but it is difficult to understand for ordinary seekers. Ancient Acharyas have described the various forms of karma theory in brief, which proves to be a good source of knowledge for ordinary seekers of truth.
The Karmagranth holds an important place among the ancient texts on karma theory. This book, written by Shrimad Devendrasur, is a complete and comprehensive work. It presents a discussion of all aspects of Jain philosophy, including karma, space, time, living beings, non-living beings, and their various classifications. The book is written in complex Prakrit language and has many famous commentaries in Sanskrit. Its discussion is also quite famous in Gujarati. A famous scholar and sage, Pt. Shri Mukhlalji, had prepared a commentary on it in Hindi about 40 years ago.
Currently, the Hindi commentary on Karmagranth was becoming difficult to obtain, and the style of commentary had also changed significantly by this time. Many seekers of truth, monks, and devout lay followers had been requesting for many years from the revered Gurudev Marudhar Kesariji Maharaj Saheb that a vast and profound text like Karmagranth should be commented upon and published in a new way. Only a capable scholar, learned, and great saint like you can accomplish this extremely laborious and expensive task. Gurudevji also felt inclined towards this and resolved to take this work forward. He started writing the commentary. The responsibility of making the commentary beautiful and informative through language, style, etc., and the work of footnotes, collection of quotes from Agamas, introduction, writing, etc., was given to the famous scholar Shriyut Shrichandji Surana.