大般涅槃經義記 4.255

4.255

第四段中，分之為四：初一偈半教修正道、次有半偈明修利益、次有一偈結勸修習、後之一偈結嘆顯勝。前中初偈勸觀佛常，先勸、後教；後半教勸法、僧亦常，以前類後，是故通言「三寶皆常」，文顯可知。

In the fourth section, it is divided into four: the first verse and a half teaches the cultivation of the correct path; next, half a verse clarifies the benefits of cultivation; next, one verse concludes by encouraging practice; the final verse concludes with praise to reveal its supremacy. In the former, the first verse encourages contemplating the Buddha as eternal, first encouraging and then instructing; the latter half instructs and encourages that the Dharma and Saṅgha are also eternal, using the former to analogize the latter, and therefore collectively states that "the Three Jewels are all eternal"—the text is evident and can be understood.