請觀音經疏闡義鈔 3.7

3.7

From "The sun from" below: emerging in the east represents the generation of good, while entering the west represents the extinction of evil. "The two capacities of arising and extinction" means that for generating good, the capacity lies in the eastern land, while for extinguishing evil, the capacity lies in the western direction; hence it is said to be in these two lands.