The works of Ādi Śaṅkarācārya

Viṣṇusahasranāmastotram

Verse 271

रः इत्युक्तः ।व्यालवद्ग्रहीतुमशक्यत्वात् व्यालः ।प्रतीतिः प्रज्ञा प्रत्ययः, 'प्रज्ञानं ब्रह्म' इति श्रुतेः ।सर्वाणि दर्शनात्मकानि अक्षीणि यस्य सः सर्वदर्शनः ।सर्वात्मकत्वात् 'विश्वतश्चक्षुः' 'विश्वाक्षम्' इति श्रुतेः ॥

In plain words

He is Vyāla, because He is as difficult to grasp as a wild serpent. Pratīti, prajñā, and pratyaya all denote direct awareness, echoing the Vedic declaration, 'Prajñāna is Brahman.' He is Sarvadarśana, the all-seeing, because every act of perception belongs to Him, as the scriptures confirm: 'Having eyes everywhere' and 'Having universal eyes.'

Close to the Sanskrit

Vyāla is so named because He is impossible to grasp, like a fierce serpent. Pratīti, prajñā, and pratyaya mean cognition, as per the Shruti text 'Prajñāna is Brahman.' Sarvadarśana is one whose eyes are all perceptive faculties, because He is the Self of all, in accordance with the Shruti texts 'Having eyes everywhere' and 'Having universal eyes.'