大般涅槃經義記 9.186

9.186

第十八門明二乘人有得作佛不作佛義。先辨諍相，諍相可知。次須論理，亦作不作，守小不作，捨小便作。義既兩兼，不得偏執。文先明作。言「一乘」者，乘行一也。言「一道」者，道法一也。言「一行」者，是乘體也。言「一緣」者，道法體也。法是行緣，故名為緣。據大攝小，其唯一故，皆當作佛。愚聞不解，便言定作。如來復說須陀洹等得小涅槃，愚人不解，便言二乘定不作佛。

The eighteenth section clarifies the meaning of whether beings of the two vehicles can attain buddhahood or not. First, the aspects of the dispute are distinguished; the aspects of the dispute can be known. Next, the principle must be discussed: they both do and do not become buddhas; clinging to the small, they do not become buddhas, but letting go of the small, they do become buddhas. Since the meaning encompasses both, one must not be one-sidedly attached. The text first clarifies becoming buddhas. 'One vehicle' means that the practice of the vehicle is one. 'One path' means that the dharma of the path is one. 'One practice' is the essence of the vehicle. 'One condition' is the essence of the dharma of the path: dharma is the condition for practice, hence it is called 'condition'. Drawing from the great to subsume the small, because it is solely one, all shall become buddhas. The foolish hear this and do not understand, so they say that they definitely will become buddhas. The Tathāgata also taught that srotāpannas and others attain minor nirvāṇa; the foolish do not understand, so they say that beings of the two vehicles definitely do not become buddhas.