大般涅槃經義記 4.39

4.39

第二段中，初先立喻，後約顯法。喻中，明能生所生，前後雖別，性同不二，以類無明及諸行等前後雖別，實性無二。文中，初言「是牛食噉水草因緣，血變成乳」明前後二。下約此二明性無二，「食甘乳甜、食苦乳苦、食肥膩草純得醍醐」明性無二，食草與穀所出之乳色味各異，食穀乳好、食草乳惡明性無二。下約顯法，「以明無明生於二相」合食水草，「血變成乳」明法相二。「若無明轉則為明」者，合食甘草乳則甜等，明性不二。「一切諸法亦復如是」以初類後，「無有二相」結成二、無二之義，亦如上辨。

In the second section, first the metaphor is established, and then the doctrine is revealed in reference to it. In the metaphor, it clarifies that although the producer and the produced are different before and after, their nature is identical and non-dual, by which it analogizes that although ignorance, formations, and so forth are different before and after, their true nature is non-dual. In the text, it first says, "Conditioned by this cow eating water and grass, blood transforms into milk," clarifying the two of before and after. Below, it clarifies that their nature is non-dual in reference to these two: "Eating sweet [grass], the milk is sweet; eating bitter [grass], the milk is bitter; eating rich grass, one obtains pure clarified butter," clarifying that their nature is non-dual; the milk produced from eating grass versus grain differs in color and flavor—when eating grain the milk is good, and when eating grass the milk is poor—clarifying that their nature is non-dual. Below, it reveals the doctrine in reference to this: "Taking light and ignorance to give rise to two characteristics" corresponds to eating water and grass; "blood transforms into milk" clarifies the duality of doctrinal characteristics. "If ignorance transforms, it becomes light" corresponds to eating sweet grass making the milk sweet, and so forth, clarifying that their nature is non-dual. "All dharmas are also like this" analogizes the subsequent by the initial; "having no two characteristics" concludes the meaning of duality and non-duality, as also distinguished above.