Goso jojin kan is an original practice to endow devotees with discovering the wisdom of Nyorai: This practice involved having the impure hearts of disciples attain the knowledge of Nyorai (Tathagata; perfected one) through yoga methods of contemplation; as they realized the pure figure of Nyorai, they would realize the prajna (insight leading to enlightenment), that it could become nothing else and they could become one with Nyorai.
五相成身観とは、行者(ぎょうじゃ)の汚れた心を、瑜伽(ゆが)の観法を通じて見きわめ、その清浄(しょうじょう)な姿がそのまま如来の智慧(ちえ)に他ならないことを知り、如来と行者が一体化して、行者に本来そなわる如来の智慧を発見するための実践法である。