成唯識論述記 1.177

1.177

述曰：由患、夢力，不了真虛，遂執所見以為實有。此喻喻上諸有情類。以下論文，護法解云：如依他起，愚夫不了此是自心，緣之執為實有外境，外境即是遍計所執。前所變者依他起性，可說非無，若執為實體，性非有，即解二性，一有一無。此對經部，三釋如前。

The Commentary states: Due to the force of illness and dreaming, failing to understand what is real and what is unreal, they consequently cling to what is seen as really existent. This analogy illustrates the sentient beings mentioned above. In the treatise text below, Dharmapāla explains: As with the dependent nature, foolish worldlings do not understand that this is their own mind, and taking it as a cognitive object, they cling to it as really existent external objects. The external objects are precisely the imagined nature. What was transformed previously is the dependent nature and can be said not to be nonexistent; if one clings to it as a real substance, that nature does not exist. Thus the two natures are explained, one as existent and one as nonexistent. This is directed against the Sautrāntikas, with three explanations as before.