法華玄論 2.28

2.28

答：諸子有二種：一不失心、二者失心。不失心子聞三引究竟皆得領悟；餘失心子聞三引不悟，故方便唱滅為說涅槃，方得受道也。若爾，《涅槃》最為鈍根人說。

Answer: The sons are of two kinds: first, those who have not lost their minds; second, those who have lost their minds. The sons who had not lost their minds heard the three guidings in their ultimacy and all attained understanding; the remaining sons who had lost their minds heard the three guidings and were not enlightened; therefore, through skillful means [the father] proclaimed his extinction and expounded nirvāṇa for them, whereupon they were finally able to accept the Path. If so, the Nirvāṇa-sūtra was spoken for people of the dullest faculties.