Pariksit inquired from Sukadeva Gosvami: O learned brahmana, demons are generally sinful, being obsessed with the modes of passion and ignorance. How, then, could Vrtrasura have attained such exalted love for the Supreme Personality of Godhead, Narayana?

Expressions researched:
"King Parīkṣit inquired from Śukadeva Gosvāmī: O learned brāhmaṇa, demons are generally sinful, being obsessed with the modes of passion and ignorance. How, then, could Vṛtrāsura have attained such exalted love for the Supreme Personality of Godhead, Nārāyaṇa"

Srimad-Bhagavatam

SB Canto 6

King Parīkṣit inquired from Śukadeva Gosvāmī: O learned brāhmaṇa, demons are generally sinful, being obsessed with the modes of passion and ignorance. How, then, could Vṛtrāsura have attained such exalted love for the Supreme Personality of Godhead, Nārāyaṇa?

SB 6.14.1, Translation and Purport

King Parīkṣit inquired from Śukadeva Gosvāmī: O learned brāhmaṇa, demons are generally sinful, being obsessed with the modes of passion and ignorance. How, then, could Vṛtrāsura have attained such exalted love for the Supreme Personality of Godhead, Nārāyaṇa?

In this material world, everyone is obsessed with the modes of passion and ignorance. However, unless one conquers these modes and comes to the platform of goodness, there is no chance of one's becoming a pure devotee. This is confirmed by Lord Kṛṣṇa Himself in Bhagavad-gītā (BG 7.28):

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." Since Vṛtrāsura was among the demons, Mahārāja Parīkṣit wondered how it was possible for him to have become such an exalted devotee.