218
Śrīmad-Bhāgavatam
[Canto 6, Ch. 4]
PURPORT
In his commentary to this verse, Śrīla Viśvanātha Cakravartī Thākura uses the word  durvijñeyam , which means very difficult to realize. The pure stage of existence is described in  Bhagavad-gītā  (7.28), wherein Kṛṣṇa says:
yeṣāṁ tv anta-gataṁ pāpaṁ janānāṁ puṇya-karmaṇām te dvandva-moha-nirmuktā bhajante māṁ dṛḍha-vratāḥ
“Persons who have acted piously in previous lives and in this life, whose sinful actions are completely eradicated and who are freed from the duality of delusion, engage themselves in My service with determination.”
Elsewhere in  Bhagavad-gītā  (9.14) the Lord says:
satataṁ kīrtayanto māṁ yatantaś ca dṛḍha-vratāḥ namasyantaś ca māṁ bhaktyā nitya-yuktā upāsate
“Always chanting My glories, endeavoring with great determination, bowing down before Me, these great souls perpetually worship Me with devotion.”
One can understand the Supreme Personality of Godhead after transcending all material impediments. Therefore Lord Kṛṣṇa also says in the  Gītā  (7.3):
manuṣyāṇāṁ sahasreṣu kaścid yatati siddhaye yatatām api siddhānāṁ kaścin māṁ vetti tattvataḥ
“Out of many thousands among men, one may endeavor for perfection, and of those who have achieved perfection, hardly one knows Me in truth.”