Among others, the first three chapters, Nimonsho (chapter of two gateways), Nigyosho (chapter of two kinds of practices), and Hongansho (chapter of the Original Vow), explain the key doctrines of the treatise.
なかでも第一の二門章、第二の二行章、第三の本願章の三章には、本書の要義が説かれる。