大般涅槃經疏 9.7

9.7

次譬比丘者，佛境難解，舉淺況深而令易了。又為三：一見火、二誓、三結。見火聚者，火從緣生。推此火聚，火為自生？為從薪生？為薪火生？為離薪火生？若火滅時，為至東方南西北方耶？生無所從、滅無所至，火聚因緣四不可取，邪見所燒。觀身亦然，不有、不無、不亦有無、不非有無悉不可得，是名正見。

Next, regarding the analogy of the monk: the Buddha's realm is difficult to understand, so the shallow is adduced to illustrate the deep and make it easy to comprehend. This also has three parts: first, seeing the fire; second, the vow; third, the conclusion. Regarding seeing a mass of fire: fire is born from conditions. Examining this mass of fire: does the fire arise from itself? Does it arise from fuel? Does it arise from both fuel and fire? Does it arise apart from fuel and fire? When the fire is extinguished, does it go to the east, south, west, or north? Arising, it has nowhere it comes from; extinguishing, it has nowhere it goes. The causes and conditions of the mass of fire cannot be grasped in the four [ways]; they are burned by wrong views. Contemplating the body is also like this: being, non-being, both being and non-being, and neither being nor non-being are all unobtainable; this is called right view.