成唯識論演祕 7.71

7.71

遍計、依他名為「二句」，或頌依他但有兩句。前初科文而有二義：一、以三性別明為三；二、以三性總分為二，遍計、依他合為一也，以此二性須相對辨。

The imagined (parikalpita) and the dependently arisen (paratantra) are called the "two lines"; alternatively, the verse on the dependently arisen has only two lines. The earlier initial outline text contains two senses: first, explaining the three natures separately as three; second, generally dividing the three natures into two, combining the parikalpita and the paratantra into one, because these two natures must be distinguished in relation to each other.