觀無量壽佛經疏 3.38

3.38

六、從作是觀已下，正明辨觀邪正。邪正義者，前日觀中已說。

Sixth, from "Making this contemplation" downward directly explains discerning whether the contemplation is erroneous or correct. The meaning of erroneous and correct was already explained in the earlier sun contemplation.