CC Madhya 11.48
mora pratijñā — tāṅhā vinā chāḍiba jīvana
A devotee with Mahārāja Pratāparudra’s determination will certainly be victorious in advancing in Kṛṣṇa consciousness. Śrī Kṛṣṇa confirms this in the Bhagavad-gītā (9.14):
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.”
These are the symptoms of a mahātmā engaged in the Lord’s service in full Kṛṣṇa consciousness. Thus Mahārāja Pratāparudra’s determination is very much exalted and is called dṛḍha-vrata. Because of this determination, he was finally able to receive Lord Caitanya’s direct mercy.