廣弘明集 21.25

21.25

Huiling of Songxi Temple inquired, saying: "The ultimate truth takes non-arising as its substance, while the conventional truth takes arisen phenomena as its substance. Yet it is said that non-arising is precisely arising, and arising is precisely non-arising. Does this mutual identity occur within their substance, or does this mutual identity occur within their meaning?"
The Prince's decree replied, saying: "They are mutually identical within their substance; they are not mutually identical in meaning."
He further inquired: "If they are not identical in meaning, how can they be identical in substance?"
The decree replied: "Worldlings see its existence, while sages behold its non-existence. In terms of perception, differences are established; with respect to the substance, they are ever identical."
He further inquired: "If the substance is not dual, why must there be identity?"
The decree replied: "Though the substance is without distinct duality, because of conditions and perceptions there is duality. Since perceptions are dual and different, it must be clarified that the substance is identical."
He further inquired: "If it is according to the decreed explanation, is the identity truly clarified with respect to persons?"
The decree replied: "In terms of persons' perceptions, there are two, and this is why the two truths are designated as arisen. If one clarifies identity purely with respect to persons' perceptions, this also involves a great impediment."