Nārada has used the word
At the same time, a "holistic" approach is also recommended. That is, we should be confident that our sincere prosecution of
kecit kevalayā bhaktyā vāsudeva-parāyaṇāḥ
aghaṁ dhunvanti kārtsnyena nīhāram iva bhāskaraḥ
"Only a rare person who has adopted complete, unalloyed devotional service to Kṛṣṇa can uproot the weeds of sinful actions with no possibility that they will revive. He can do this simply by discharging devotional service, just as the sun can immediately dissipate fog by its rays."
Devotional service is beyond both piety and impiety. By chanting Hare Kṛṣṇa, hearing about Lord Kṛṣṇa, and performing other routine services in Kṛṣṇa consciousness, one vanquishes all phases of sinful life and all unwanted habits.
The practical application of this principle is to persevere in