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Śrīmad-Bhāgavatam
[Canto 8, Ch. 1]
unborn, beginningless;  purāṇaḥ —the oldest;  dhatte —He performs;  asya —of this universe;  janma-ādi —the creation, maintenance and annihilation;  ajayā —by His external energy;  ātma-śaktyā —by His personal potency;  tām —that external material energy;  vidyayā —by His spiritual potency;  udasya —giving up;  nirīhaḥ —without any desire or activity;  āste —He is existing (untouched by the material energy).
TRANSLATION
The entire cosmic manifestation is the body of the Supreme Personality of Godhead, the Absolute Truth, who has millions of names and unlimited potencies. He is self-effulgent, unborn and changeless. He is the beginning of everything, but He has no beginning. Because He has created this cosmic manifestation by His external energy, the universe appears to be created, maintained and annihilated by Him. Nonetheless, He remains inactive in His spiritual energy and is untouched by the activities of the material energy.
PURPORT
Śrī Caitanya Mahāprabhu says in His  Śikṣāṣṭaka ,  nāmnām akāri bahudhā nija-sarva-śaktiḥ : the Supreme Personality of Godhead has many names, which are all nondifferent from the Supreme Person. This is spiritual existence. By chanting the Hare Kṛṣṇa  mahā-mantra , consisting of names of the Supreme Lord, we find that the name has all the potencies of the person. The Lord's activities are many, and according to His activities He has many names. He appeared as the son of mother Yaśodā, and also as the son of mother Devakī, and therefore He is named Devakī-nandana and Yaśodā-nandana.  Parāsya śaktir vividhaiva śrūyate : the Lord has a multitude of energies, and therefore He acts in multifarious ways. Yet He has a particular name. The  śāstras  recommend which names we should chant, such as Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare. It is not that we have to search for some name or manufacture one. Rather, we must follow the saintly persons and the  śāstras  in chanting His holy name.
Although the material and spiritual energies both belong to the Lord, He is impossible to understand as long as we are in the material energy. And when we come to the spiritual energy, He is very easy to know. As