大般涅槃經義記 4.249

4.249

就明因中，答前三問明其證行，答後三問明其教行。契會常住是其證行，通教權實是其教行，證行自利，教行利他。就證行中，初答云何示人天道，正明證體；第二超答云何離病，明其得證除障之益；第三起答云何知性而受法樂，明其得證生樂之益。後教行中，三問通答，文中從初盡偈已來答初兩問，明涅槃果并顯證體；偈後長行答次兩問，明證利益；「今者如來欲為未來作大明」下答後三問明其教行。

In clarifying the causes: answering the first three questions clarifies practice based on realization; answering the latter three questions clarifies practice based on teaching. Accordance with eternal abidance is the practice based on realization; communicating the teaching of provisional and ultimate is the practice based on teaching. Practice based on realization benefits oneself; practice based on teaching benefits others. In the practice based on realization: first, answering "How is the path of humans and gods demonstrated?" directly clarifies the essence of realization; second, jumping ahead to answer "How does one become free from illness?" clarifies the benefit of removing obstacles upon attaining realization; third, answering "How does one know the nature and experience dharma-pleasure?" clarifies the benefit of generating joy upon attaining realization. In the subsequent practice based on teaching, the three questions are answered collectively. In the text, from the beginning up through the verses, it answers the first two questions, clarifying the fruit of nirvāṇa and revealing the essence of realization; the prose after the verses answers the next two questions, clarifying the benefits of realization; from "Now the Tathāgata wishes to become a great lamp for the future" onward, it answers the latter three questions, clarifying practice based on teaching.