In this book, written by Tarapada Bhattacharya, one finds an elaborate analysis of the Nyāya theory of self. Following a discussion of the proofs for the existence of self, one finds deliberations on the nature of self as distinct from body. Nyāya arguments for the view that self is eternal and has attributes have been presented. The plurality and ubiquitous nature of self have been proved. The question about the emancipation of self has been discussed. The book ends with a discussion on the nature of god as paramātmān.