大般涅槃經義記 10.152

10.152

觀不淨中，初先正辨，「迦葉言」下辨觀虛實。前中初舉，「何以」下釋，「是名」下結。後中，先問後答可知。教修願中，先舉邪願誡之令捨，後舉正願嘆之令學。

In contemplating impurity, first he directly explains it; from "Kāśyapa said" downward, he distinguishes the unreality and reality of the contemplation. In the former, first he introduces it; from "Why?" downward is the explanation; from "This is called" downward is the conclusion. In the latter, the questions and answers can be understood. In teaching the cultivation of aspirations, first he raises wrong aspirations, admonishing them to be abandoned; afterwards, he raises correct aspirations, praising them to be practiced.