大般涅槃經義記 8.270

8.270

二「若是了因性是了」下徵令自了。徵相云何？若是乳中所有了因性是了者，常應自了，使人眼見不能自了；使人眼見，明性非了。既無性了，寧有性酪？三「若是不了，何能了他」難破了他。難相云何？乳中了因不能自了，何能了他乳中之酪令其性有？

Second, from "If it is a clarifying cause, its nature is to clarify" below, he interrogates it to make it clarify itself. What is the character of this interrogation? If whatever clarifying cause is within milk has clarifying as its nature, it should constantly clarify itself and cause people to see it with their eyes; yet it cannot clarify itself and cause people to see it with their eyes, which clearly shows its nature is not clarifying. Since it lacks a nature-clarifier, how could it have a nature-curd? Third, "If it does not clarify [itself], how can it clarify another?" challenges and refutes its clarifying another. What is the character of this challenge? If the clarifying cause in milk cannot clarify itself, how can it clarify another—the curd in the milk—so as to make its nature exist?