Text 42]
Calculation of Time, from the Atom
439
TEXT 42
तदादुरक्षरं ब्रह्म सर्वकारणकारणम् । विष्णोर्भाम परं साक्षात्पुरुषस्य महात्मनः ॥४२॥
tad āhur akṣaraṁ brahma sarva-kāraṇa-kāraṇam viṣṇor dhāma paraṁ sākṣāt puruṣasya mahātmanaḥ
tat —that;  āhuḥ —is said;  akṣaraṁ —infallible;  brahma —the supreme;  sarva-kāraṇa —all causes;  kāraṇam —the supreme cause;  viṣṇoḥ dhāma —the spiritual abode of Viṣṇu;  paraṁ —the supreme;  sākṣāt —without doubt;  puruṣasya —of the  puruṣa  incarnation;  mahātmanaḥ —of the Mahā-Viṣṇu.
TRANSLATION
The Supreme Personality of Godhead, Śrī Kṛṣṇa, is therefore said to be the original cause of all causes. Thus the spiritual abode of Viṣṇu is eternal without a doubt, and it is also the abode of Mahā-Viṣṇu, the origin of all manifestation.
PURPORT
Lord Mahā-Viṣṇu, who is resting in  yoga-nidrā  on the Causal Ocean and creating innumerable universes by His breathing process, only temporarily appears in the  mahat-tattva  for the temporary manifestation of the material worlds. He is a plenary portion of Lord Śrī Kṛṣṇa, and thus although He is nondifferent from Lord Kṛṣṇa, His formal appearance in the material world as an incarnation is temporary. The original form of the Personality of Godhead is actually the  svarūpa  or real form, and He eternally resides in the Vaikuṇṭha world (Viṣṇuloka). The word  mahāt-manaḥ  is used here to indicate Mahā-Viṣṇu, and His real manifestation is Lord Kṛṣṇa, who is called  parama , as confirmed in the  Brahma-saṁhitā :
iśvaraḥ paramaḥ kṛṣṇaḥ sac-cid-ānanda-vigrahaḥ anādir ādir govindaḥ sarva-kāraṇa-kāraṇam
“The Supreme Lord is Kṛṣṇa, the original Personality of Godhead known as Govinda. His form is eternal, full of bliss and knowledge, and He is the original cause of all causes.”
Thus end the Bhaktivedanta Purports of the Third Canto, Eleventh Chapter, of the Śrīmad-Bhāgavatam, entitled “Calculation of Time, from the Atom.”