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Śrīmad-Bhāgavatam
[ Canto 3, Ch. 21 ]
one can hear the transcendental name of Kṛṣṇa, no one can understand His transcendental form, and no one can assimilate His transcendental pastimes. It is not possible. Then how is it possible that He can be seen and understood? When one is trained in devotional service and renders service unto Him, gradually one's senses are purified of material contamination. When one's senses are thus purified, then one can see, one can understand, one can hear and so on. The purification of the material senses and perception of the transcendental form, name and quality of Kṛṣṇa are combined together in one word,  pratyag-akṣaja , which is used here.
TEXT 34
निरीक्षतस्तस्य ययावशेष- सिद्धेश्वराभिष्टुतसिद्धमार्गः । आकर्णयन् पत्ररथेन्द्रपक्षै- रुच्चारितं स्तोममुदर्णसाम ॥३४॥
nirīkṣatas tasya yayāv aśeṣa- siddheśvarābhiṣṭuta-siddha-mārgaḥ ākarṇayan patra-rathendra-pakṣair uccāritam stomam udīrṇa-sāma
nirīkṣataḥ tasya —while he was looking on;  yayau —He left;  aśeṣa —all;  siddha-īśvara —by liberated souls;  abhiṣṭuta —is praised;  siddha-mārgaḥ —the way to the spiritual world;  ākarṇayan —hearing;  patra-ratha-indra —of Garuḍa (king of birds);  pakṣaiḥ —by the wings;  uccāritam —vibrated;  stomam —hymns;  udīrṇa-sāma —forming the  Sāma Veda .
TRANSLATION
While the sage stood looking on, the Lord left by the pathway leading to Vaikuṇṭha, a path extolled by all great liberated souls. The sage stood listening as the hymns forming the basis of the  Sāma Veda  were vibrated by the flapping wings of the Lord's carrier, Garuḍa.
PURPORT
In the Vedic literature it is stated that the two wings of the transcendental bird Garuḍa, who carries the Lord everywhere, are two divisions of the  Sāma Veda  known as  bṛhat  and  rathāntara . Garuḍa works as the carrier of