Krishna is knowable not through scholarly Vedic study, but only through the heart of a devoted servant.Listen — Srila Prabhupada Uvaca
Śrī Brahma-saṁhitā 5.33 — July 19, 1971, New York 710719BS-NEW YORK [13:30 Minutes] Brahma-samhita-05.33_710719BS-NEW YORK Prabhupāda: advaitam acyutam anādim ananta-rūpam ādyaṁ purāṇa-puruṣaṁ nava-yauvanaṁ ca vedeṣu durlabham adurlabham ātma-bhaktau govindam ādi-puruṣaṁ tam ahaṁ bhajāmi [Bs. 5.33] So advaita. Advaita means without duality. Advaita acyuta, Kṛṣṇa and Kṛṣṇa's expansion. Kṛṣṇa's expansion: Baladeva, Saṅkarṣaṇa, Aniruddha, Pradyumna.
Then Nārāyaṇa, then Mahā-Viṣṇu, Kāraṇodakaśāyī Viṣṇu—innumerable expansions. Advaitam acyutam anādim ananta-rūpam [Bs. 5.33]. Each and every form, Kṛṣṇa's, they are without any duality. Just like I and my photograph, that is my expansion, but it is not one; it is dual. What service you can take from me, you cannot take the service from the photograph.
Therefore it is not advaita; it is dvaita, duality. You may have millions of photographs, but each one of them, they're different. But Kṛṣṇa, He has got millions of forms, They're one. That is the difference. Advaitam acyutam.
Acyutam means one who does not fall down. Because He has expanded in so many forms, it does not mean the potency of Kṛṣṇa has decreased. The same thing you chant in the Īśopaniṣad: pūrṇasya pūrṇam ādāya pūrṇam evāvaśiṣyate [Iso Invocation]. Kṛṣṇa is so full, pūrṇa.
Pūrṇa means complete. If you take complete Kṛṣṇa from Kṛṣṇa, still, He is Kṛṣṇa. That you cannot understand in the materialistic condition, because if I have got one rupee or one dollar, if I take that one dollar, then it becomes zero. But Kṛṣṇa is so complete, you go on taking Kṛṣṇa, Kṛṣṇa, Kṛṣṇa, Kṛṣṇa, still, Kṛṣṇa is complete. Advaita acyuta.
Acyuta means does not diminish or does not fall. Advaitam acyutam anādi. Anādi means it has no beginning. Because we have got this material body we have got a beginning. You may ask somebody, "What is your birthday?" That means beginning.
Anything material, it has got a beginning and end. Anything which has got beginning has got end also, and change also. So Kṛṣṇa has no beginning, there is no end, and there is no change. Try to understand. Advaitam acyutam anādim ananta-rūpam [Bs. 5.33].