His autobiography has been highly valued as a historical material on Buddhism in the Kamakura period because it was based on materials which he possessed, written clearly and in detail, and there was not much discrepancy between his autobiography and other materials on history or with the history of Buddhism written in those days.
叡尊自身が保持していた諸資料を基にして書かれていること、内容が詳細明晰であること、当時の他の歴史・仏教史料と比べても大きな相違がないことから、鎌倉時代における仏教史料として高く評価されている。