This study considers the construction of Senchaku hongan nembutsu shu (選択本願念仏集) from two viewpoints. The first view point is an approach from ordinary sinful people and the other is an approach from Three Buddhas (三仏) (namely, Amida Buddha, Sakyamuni Buddha and the many Buddhas of the six directions). We learn the true meaning of why Honen (法然) emphasized that we must rely solely on Shandao (善導) as our master.