大般涅槃經義記 8.264

8.264

自下第二呵其妄取。「明當服蘇，今已患臭」立喻呵責。「言乳有酪亦復如是」合喻呵責。知酪後出，先生有想。

From here below is the second [part], rebuking his false grasping. "Tomorrow one expects to take ghee, yet today one already worries about its foul smell" establishes a metaphor to rebuke him. "Saying that milk has curds is also like this" matches the metaphor to rebuke him. Knowing that curds will emerge later, one beforehand gives rise to the conception of existence.