Nigyosho explains that, based on "Kammuryojukyosho" (Jugyo Risshin Jaku) by Shandao, invocation of the Buddha's Name is the very Shojo no go (a Rightly Established Practice) for birth in the Pure Land that meets the way of Buddha among the five shogyo (right practices), and encourages people to do away with zogyo (miscellaneous practices).
二行章では、善導の『観無量寿経疏』（就行立信釈）などをうけて、五正行のなか、称名念仏こそ、仏願にかなった往生の正定業であることを説明し、雑行は捨てるべきであることを示す。