""The Constitution of the Ego"" is a philosophical book written by A.P. Sinnett. It explores the nature of the human ego, or self, and its relationship to the universe. The book delves into the idea that the ego is not just an individual entity, but is connected to a larger cosmic consciousness. Sinnett argues that this understanding of the ego can lead to a greater understanding of the purpose of life and the nature of reality. The book is written...