Mundaka 4.02
etajjānatha sadasadvareṇyaṃ paraṃ vijñānād yadvariṣṭhaṃ prajānām। yadarćimad yadaṇubhyo'ṇu ca yasmin lokā nihitā lokinaśca ॥2॥
Understand this as the most excellent reality beyond mastered-knowledge, supreme among beings, radiant and subtler than minute particles, in which all worlds and their inhabitants reside.
Bhāshya 4.02
Beyond 'vijñānā' i.e. mastered-knowledge or science, is the ultimate Brahman. A testimonial from Bhāgavata Purāṇa is provided to elaborate on this aspect.
vijñānād brahmaṇaḥ param।
Beyond 'vijñānā' i.e. mastered-knowledge, is the ultimate Brahman.
"nābhihṛdādiha sato'mbhasi yasya puṃso vijñānaśaktirahamasamanantaśakteḥ।"
"At the beginning of the universe, in the primordial waters, at the navel and heart of existence, I embodied the power of knowledge of the infinitely powerful being."
iti bhāgavate।
- stated thus in the Bhāgavata Purāṇa.