Yat gyatva matto bhavati, Sthabhdho bhavati, atmaramo bhavati. (यत् ज्ञात्वा मतो भवति , स्थब्धो भवति, आत्मरमो भवति) Narad is, here describing a person attained to Bhakti. Once a person has drowned himself in the ocean of devotion, he abandons everything in the care of God. He becomes like an empty vessel in an ocean. Then, god descends into him and takes charge of everything. Now, such a person becomes a vessel of god. He moves, as god desires him to. Such a person may appear to be of unsound mind to the worldly people since he is no longer bound by the societal norms or cannons of scriptures. Such a person sometimes sits quietly in a state of ‘Samadhi’ sometimes he is dancing or singing for no reason examples of Chaitnya, Mira, Ramkrishna, Paramhansa are of such devotees. The devotion in full details described in Shri Narad Bhakti Sutras: Here is some contents: Shri Narad Bhakti Sutras(Ch 2) ------------------------------------------- NBS 18: Śāṇḍilya says that bhakti results from one's removing all obstructions to taking pleasure in the Supreme Self. NBS 19: Nārada, however, says that bhakti consists of offering one's every act to the Supreme Lord and feeling extreme distress in forgetting Him. NBS 20: Bhakti is, in fact, correctly described in each of these ways. NBS 21: The cowherd women of Vraja are an example of pure bhakti. NBS 22: Even in the case of the gopīs, one cannot criticize them for forgetting the Lord's greatness. NBS 23: On the other hand, displays of devotion without knowledge of God's greatness are no better than the affairs of illicit lovers. NBS 24: In such false devotion one does not find pleasure exclusively in the Lord's pleasure. NBS 25: Pure devotional service, on the other hand, is far superior to fruitive work, philosophical speculation, and mystic meditation. NBS 26: After all, bhakti is the fruit of all endeavor. NBS 27: Furthermore, the Lord dislikes the proud but is pleased with the humble. NBS 28: Some say that knowledge is the means for developing devotion. NBS 29: Others consider bhakti and knowledge interdependent. NBS 30: But the son of Brahmā says that bhakti is its own fruit. NBS 31-32: This is illustrated by the examples of a royal palace, a meal, and so on. A king is not really satisfied just by seeing a palace, nor can someone placate his hunger just by looking at a meal. NBS 33: Therefore seekers of liberation should take to devotional service alone. submission is the necessary condition for the devotion but submission alone is not the devotion as even an evil or slave can submit to his master. There are few necessary attributes of devotion 1. Following the truth 2. Absence of any secondary self desires than God. Sutra#23 describes the first: NBS #23: On the other hand, displays of devotion without knowledge of God's greatness are no better than the affairs of illicit lovers. This Sutra define that one should submit to God and must posses the truth. Sutra#7 defines that one should leave his desire as devotion is the path of renunciation and not desires. Referene: NBS#7. Sa na Kamayamana, nirodharupwat. (स न कामयाम्ना, निरोधरुप्वत) That (Bhakti) is not full of desires it is of the nature of renunciation. Next sutra further describe the very renounciation. NBS#9. Tasminnanyata tadavirodhisudasinata. (तस्मिन्नन्यता तदा विरोधिषु उदासीनता) To become one with him and to have no interest in anything else is also called renunciation. "Hare Krishna"