大般涅槃經義記 9.162

9.162

下舉廣略淺深為類。「如來為生廣中說略、略中說廣」以為一門，廣略不定。「第一義諦說為世諦、世諦說為第一義諦」復為一門，淺深不定。「云何名為廣中說」下，釋顯初門。「云何第一說世諦」下，釋顯後門。「如汝得法故名阿若憍陳如」者，阿之言無，若之言智，陳如是姓，證無成智故名無智。

Below, it adduces broad and concise, shallow and deep, as categories. "For the sake of sentient beings, the Tathāgata speaks of the concise within the broad, and speaks of the broad within the concise" forms one category: broad and concise are indeterminate. "Speaks of the ultimate truth as conventional truth, and speaks of conventional truth as ultimate truth" forms another category: shallow and deep are indeterminate. "Why is it called speaking within the broad..." and below explains and reveals the first category. "Why is the ultimate spoken of as conventional truth..." and below explains and reveals the latter category. "Just as you attained the Dharma and are therefore named Ājñāta-Kauṇḍinya": ā means without [a-], jñāta means knowledge [jñā-]; Kauṇḍinya is his clan name; having realized the unconditioned, he accomplished wisdom, hence he is named "having non-knowledge" [Ājñāta].