Text 44]
The Glories of Devotional Service
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The words explicitly used here are  yuktena bhakti-yogena . Those  yogīs  or mystics who engage in devotional service are the first-class  yogīs . The first-class  yogīs , as described in  Bhagavad-gītā , are those who are constantly thinking of the Lord, the Supreme Personality of Godhead,  Kṛṣṇa . These  yogīs  are not without knowledge and renunciation. To become a  bhakti-yogī  means to automatically attain knowledge and renunciation. That is the consequent result of  bhakti-yoga . In the  Bhāgavatam , First Canto, Second Chapter it is also confirmed that one who engages in devotional service of  Vāsudeva ,  Kṛṣṇa , has complete transcendental knowledge and renunciation, and there is no explanation for these attainments.  Ahaitukī —without reason, they come. Even if a person is completely illiterate, simply because of his engagement in devotional service, the transcendental knowledge of the scriptures is revealed unto him. That is also stated in the Vedic literature. To anyone who has full faith in the Supreme Personality of Godhead and the spiritual master, all the import of the Vedic literatures is revealed. He doesn't have to seek separately; the  yogīs  who engage in devotional service are full in knowledge and renunciation. If there is a lack of knowledge and renunciation, it is to be understood that he is not in full devotional service. The conclusion is that one cannot be sure of entrance into the spiritual realm—in either the impersonal  brahmajyoti  effulgence of the Lord or the  Vaikuṇṭha  planets within that Brahman effulgence—unless he is surrendered unto the lotus feet of the Supreme Lord. The surrendered souls are called  akuto-bhaya . They are doubtless and fearless, and their entrance into the spiritual kingdom is guaranteed.
TEXT 44
एतावानेव लोकेऽस्मिन् पुंसां निःश्रेयसोदयः । तीव्रेण भक्तियोगेन मनो मग्यर्पितं स्थिरम् ॥४४॥
etāvān eva loke 'smin   puṁsāṁ niḥśreyasodayaḥ   tīvreṇa bhakti-yogena   mano mayy arpitaṁ sthiram
etāvān eva —only so far;  loke asmin —in this world;  puṁsāṁ —of men;  niḥśreyasa —final perfection of life;  udayaḥ —the attainment of;  tīvreṇa —intense;  bhakti-yogena —by practice of devotional service;  manaḥ —mind;  mayi —in Me;  arpitaṁ —fixed;  sthiram —steady.