Śvetāśvatara Upaniṣad · 1..11
अपाणिपादो जवनो ग्रहीता पश्यत्यचक्षुः स शृणोत्यकर्णः स वेदि मुख्यो मनसा मनस्यः स चेति तत्त्वेन च वाङ्मयश्च
apāṇipādo javanogrāhītā paśyatyacakṣuḥ sa śṛṇotyakarṇaḥ sa vetti mukhyo manasā manasyaḥ sa cetti tattvena ca vāṅmayaḥ ca
Without hands or feet, He runs and grasps; without eyes He sees, without ears He hears. He knows what is to be known, He is the Lord of mind and mind itself. He is known by those who know Him in truth, He is the origin of speech.
This apparently paradoxical description reveals the transcendent nature of Brahman: He has no senses and yet is the source of all sensory functioning. He is manas (mind) and beyond mind; He is vāk (speech) and its origin. In our yoga practice, when we meditate upon these verses, we recognize that our faculties are borrowed, reflections of a supreme Consciousness that acts through us. He who knows this truth in essence (tattvena) knows Brahman, because Brahman is the very essence of knowledge.