大般涅槃經義記 4.47

4.47

自下第四廣顯不二成前第二，初先立喻，「明無明」下約之顯法，「以是緣」下結會前喻，「佛性亦爾」舉法以帖。喻中有四：一就乳因果建立二相，喻明、無明法相之二；二「是乳雖從草血出」下就乳因果明性無二，喻明、無明實性不二；三「是乳滅」下就酪因果建立二相，喻行、識等法相之二；四「是故不得定言」已下就酪因果明性無二，喻行、識等實性不二。

From here below, the fourth part extensively reveals non-duality, completing the second part above. First it establishes a simile; from 'clarity and ignorance' downward, it applies it to reveal dharmas; from 'due to these conditions' downward, it concludes and correlates with the preceding simile; 'buddha-nature is also like this' cites the dharma to correspond. Within the simile there are four parts: first, based on the cause and effect of milk, it establishes two characteristics, analogising the duality of the dharma-characteristics of clarity and ignorance; second, from 'although this milk emerges from grass and blood' downward, based on the cause and effect of milk, it explains that the nature is non-dual, analogising that the true nature of clarity and ignorance is non-dual; third, from 'when this milk ceases' downward, based on the cause and effect of cheese, it establishes two characteristics, analogising the duality of the dharma-characteristics of volitional formations, consciousness, and so forth; fourth, from 'therefore one cannot definitely say' downward, based on the cause and effect of cheese, it explains that the nature is non-dual, analogising that the true nature of volitional formations, consciousness, and so forth is non-dual.