The name ‘sarvajña’ in the Vishnusahasra nāma
In the Vishnusahasra nāma (VSN) the name ‘sarvajña’ occurs twice. In the first occurrence (453) Shankara gives the meaning:
सर्वश्च असौ ज्ञश्च इति सर्वज्ञः, ’इदं सर्वं यदयमात्मा’ (बृ.उ.२.४.६) इति श्रुतेः ।
[He is Alḷ and Consciousness. Says the śruti’ – All this is verily this Ātmā’ (Bṛ.up.2.4.6)]
This explanation to the name is unique in the sense that it does not consider the name as that of a person but Pure Consciousness, Nirguna Brahman. There is one other place that Shankara has given this explanation, in the Māṇḍūkya kārikā:
सकृद्विभातं सर्वज्ञं नोपचारः कथञ्चन ॥ ३६ ॥
अत एव सर्वं च तत् ज्ञप्तिस्वरूपं चेति सर्वज्ञम् । mandukya karika 4.36 bhashyam.
Here the term is in the neuter.
The other occurrence of that name in the VSN is in 815 where Shankara takes the general, common, meaning: the Omniscient Iśvara, who knows everything. The Munḍaka (यः सर्वज्ञः सर्ववित्..) and the ‘māṇḍūkya 6th mantra ‘एष सर्वज्ञः..’ are very popular ones. In the prasthānatraya bhashyam Shankara uses this word in innumerable places in this sense of Iśvara: सर्वज्ञेन ईश्वरेण. With regard to Lord Śiva too Shankara uses this term in the Kenopaniṣat pada bhāṣya while referring to Umā. That shows that Shankara is not interested in showing any particular deity alone as the Omniscient Iṣvara of Advaita Vedanta.
The VSN bhāṣya is a fine source of information on Hari-Hara abheda and Trimūrti aikya. Shankara’s quotes cover a wide range of scriptural literature in substantiation of this.
Om Tat Sat