大乘起信論廣釋卷第三．四．五 4.130

4.130

論。以不解故至生死等法　釋曰。此正明執相也。以迷教意不解真如隨緣義。故便作是執。若如來藏體無染者。云何能生一切染法。又何能為世間染依。故知體具世間染法。

[Treatise:] Because they do not understand, [they grasp that the tathāgatagarbha's self-nature inherently possesses all] dharmas of saṃsāra [and the like]—
[Commentary:] "Explication": This directly explains the characteristic of attachment. Because they are confused about the intention of the teaching and do not understand the meaning of tathatā conforming to conditions, they formulate this attachment: "If the substance of the tathāgatagarbha lacks defilement, how could it produce all defiled dharmas? And how could it serve as the support for mundane defilements? Hence we know that its substance inherently possesses the defiled dharmas of the world."