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Śrī-Caitanya-caritāmṛta
cause of all causes, from whom all manifested universes arise, in whom they dwell and by whom they are destroyed. I meditate upon that eternally effulgent Lord who is directly and indirectly conscious of all manifestations and yet is fully independent.” The Supreme Personality of Godhead knows very well how to do everything perfectly. He is  abhijñaḥ , always fully conscious. The Lord therefore says in  Bhagavad-gītā  (Bg. 7.26) that He knows everything, past, present and future, but no one but a devotee knows Him as He is. Therefore, the Absolute Truth, the Personality of Godhead, is at least partially understood by devotees of the Lord, but the Māyāvādī philosophers who unnecessarily speculate to understand the Absolute Truth simply waste their time.
TEXT 128
‘अगव’ से महावाक्य — वेदेन्न निदान । 
    छेथरस्रक्रप अगव सर्वविष्य-धाम ॥ ১২৮ ॥
‘praṇava’ se mahāvākya — vedera nidāna 
    īśvara-svarūpa praṇava sarva-viśva-dhāma
SYNONYMS
praṇava —the  oṁkāra ;  se —that;  mahā-vākya —transcendental sound vibration;  vedera —of the  Vedas ;  nidāna —basic principle;  īśvara-svarūpa —direct representation of the Supreme Personality of Godhead;  praṇava — oṁkāra ;  sarva-viśva —of all universes;  dhāma —is the reservoir.
TRANSLATION
“The Vedic sound vibration  oṁkāra , the principle word in the Vedic literatures, is the basis of all Vedic vibrations. Therefore one should accept  oṁkāra  as the sound representation of the Supreme Personality of Godhead and the reservoir of the cosmic manifestation.
PURPORT
In  Bhagavad-gītā  (Bg. 8.13) the glories of  oṁkāra  are described as follows:
om ity ekākṣaraṁ brahma  
 vyāharan mām anusmaran  
 yaḥ prayāti tyajan dehaṁ  
 sa yāti paramāṁ gatim
This verse indicates that  oṁkāra , or  praṇava , is a direct representation of the Supreme Personality of Godhead. Therefore if at the time of death one simply remembers  oṁkāra , he remembers the Supreme Personality of Godhead and is therefore immediately transferred to the spiritual world.  Oṁkāra  is the basic principle of all