Because Mahārāja Parīkṣit took his birth in the family of Mahārāja Yudhiṣṭhira, he is addressed herein as the mahā-bhāgavata, or the greatest of the fortunates. The family in which a mahā-bhāgavata takes his birth is fortunate because due to the birth of a first-grade devotee the members of the family, past, present and future up to one hundred generations, become liberated by the grace of the Lord, out of respect for His beloved devotee. Therefore, the highest benefit is done to one's family simply by becoming an unalloyed devotee of the Lord
(Srimad Bhagavatam----1:12:17----purport).

The Personality of Godhead Śrī Rāmacandra attempted to bridge the Indian Ocean to reach the island of Laṅkā, but Śrī Hanumānjī, the unalloyed devotee of the Personality of Godhead, could cross the ocean simply by jumping over it. The Lord is so merciful upon His pure devotee that He presents His beloved devotee as more powerful than Himself. The Lord expressed Himself to be unable to save Durvāsā Muni, although the Muni was so powerful that he could reach the Lord directly under material conditions. But Durvāsā Muni was saved by Mahārāja Ambarīṣa, a devotee of the Lord. Therefore, not only is a devotee of the Lord more powerful than the Lord, but also worship of the devotee is considered more effective than direct worship of the Lord (mad-bhakta-pūjābhyadhikā [SB 11.19.21]).
(Srimad Bhagavatam----2:4:10----purport).

Murāri Gupta could not be called even a brahma-bandhu because he was born of a vaidya family and according to the social structure was therefore considered a śūdra. But Kṛṣṇa bestowed special mercy upon Murāri Gupta because he was a beloved devotee of the Lord, as stated by Śrī Caitanya Mahāprabhu. The purport of Śrī Bhaktisiddhānta Sarasvatī Ṭhākura’s elaborate discussion of this subject is that no qualification in this material world can satisfy the Supreme Personality of Godhead, Kṛṣṇa, yet everything becomes successful simply through development of devotional service to the Lord.
(Sri Caitanya Caritamrta----1:17:78----purport).