This book was the main literary work of Enju written in the format in which learned priests of various sects interactively exchanged questions and answers extracted from the key sentences of literary works that were the gist of the teachings of various sects such as Yuishiki, Kegon and Tendai in addition to Zen but, ultimately, those different views were consolidated under the principles of 'Shinshu' (another term for the Zen Sect).
延寿の主著が、本書であり、禅をはじめとして、唯識・華厳・天台の各宗派の主体となる著作より、その要文を抜粋しながら、各宗の学僧によって相互に質疑応答を展開させ、最終的には「心宗」によってその統合をはかるという構成になっている。