大般涅槃經義記 8.133

8.133

三就體說，此之佛性雖名為空，體是真心，心是覺性，故名智慧，故《華嚴》云「一切眾生心微塵中有無師智、無礙智、廣大智」等，馬鳴論中說為本覺。問曰：凡時未有智解，以何義故得名為覺？論自釋言「從本以來有大智慧光明義故、遍照一切法界義故、自性清淨識知義故，名之為覺。」是義云何？真心體中具過恒沙一切佛法，心於彼法同體照明，由來無障，名照法界，故名智慧。

Third, speaking in terms of essence, although this buddha-nature is named empty, its essence is the true mind; the mind is the nature of awakening, hence it is named wisdom. Therefore the Avataṃsaka says, "Within the fine dust of the minds of all sentient beings, there is unmastered wisdom, unobstructed wisdom, vast wisdom," and so forth; in Aśvaghoṣa's treatise it is spoken of as original awakening. Question: At the time of an ordinary being, there is not yet wisdom or understanding; by what meaning does it obtain the name of awakening? The treatise itself explains: "Because from the beginning it has the meaning of the light of great wisdom, because it has the meaning of universally illuminating all the dharmadhātu, and because it has the meaning of naturally pure conscious knowing, it is named awakening." What is the meaning of this? Within the essence of the true mind, all buddha-dharmas exceeding the sands of the Ganges are fully present; the mind illuminates those dharmas with an identical essence, having been unobstructed from the beginning; this is called illuminating the dharmadhātu, and hence it is named wisdom.