"The cognition (bodha) that has sense-objects such as sound etc. as its content, having subsumed (anantarbhāvya) that object, is itself knowledge (jñāna) that is of the very nature of the Self (ātmasvarūpabhūta). As has been said by Sureshwaracharya in the Brihadāraṇyaka Vārtika 159: 'That awareness (saṃvit) which is regarded as the fruit (phala) in the cognition of external objects of knowledge, is itself the object (Brahman-Atman) to be known (meya) here, as established by Vedānta, the supreme authority.' Such indeed is the 'knowledge' (jñāna) referred to — meaning: by the sentence (vākya) that is the means of knowledge (jñānasādhana)." — [verse 77]
The idea is that even in the commonplace cognition of sense objects, it is the Pure Consciousness, Brahman Atman, that is cognised, only tainted by the objects. The Kenopanishad 2.4 too teaches the same in this passage:
प्रतिबोधविदितं मतममृतत्वं हि विन्दते । आत्मना विन्दते वीर्यं विद्यया विन्दतेऽमृतम् ॥
Om Tat Sat
The idea is that even in the commonplace cognition of sense objects, it is the Pure Consciousness, Brahman Atman, that is cognised, only tainted by the objects.
