大般涅槃經義記 8.91

8.91

〈師子品〉者，上明隨緣造修之行，下明捨相入證之行。因師子吼啟請宣說，故就請人以題章目名〈師子吼品〉。此人內證師子吼，定能吼所問，故名其人為師子吼。此品答上一切法中悉有樂性，唯願世尊為我分別。然上問中單問所證，今此品中具以顯之。下說佛性是其所證，下明見行是其能證，故外國人名此以為離諸放逸入證分矣。

"Chapter on the Lion['s Roar]": above, it explained the practice of cultivating through adapting to conditions; below, it explains the practice of abandoning marks and entering realization. Because it is proclaimed upon Lion's Roar's petition, the title of the chapter is named the "Chapter on Lion's Roar" after the petitioner. This person internally realized the lion's roar, and being certain to be able to roar what was asked, the person was therefore named Lion's Roar. This chapter answers the above request: "In all dharmas there is universally the nature of bliss; would that the World-Honoured One analyze it for me." However, the question above asked solely about what is realized, whereas now in this chapter it is fully revealed. Below, the explanation of buddha-nature is what is realized, and below, the explanation of the practice of seeing is that which can realize it; therefore people from foreign lands called this the section on leaving all negligence and entering realization.