Pure devotional service means satisfying Krishna's desires, never one's own senses or interests.Listen — Srila Prabhupada Uvaca
The Nectar of Devotion — October 28, 1972, Vṛndāvana 721028ND-VRNDAVAN [34:52 Minutes] NOD_721028ND-VRNDAVAN Pradyumna: [reading] "...sometimes divided into four parts, just as the ocean is sometimes divided into four parts, and there are different sections within each of these four divisions. Originally in Bhakti-rasāmṛta-sindhu, the ocean is divided like the watery ocean, into east, west, north and south, while the sub-sections within these different divisions are called waves. As in the ocean, there are always different waves, either on the eastern side, the western side, the northern side or the southern side, so similarly, Bhakti-rasāmṛta-sindhu has different waves. "In the first part there are four waves, the first being a general description of devotional service. The second concerns the regulative principles for executing devotional service, and the third wave is devotional service in ecstasy.
In the fourth is the ultimate goal, love of God. These will be explicitly described, along with their different symptoms. "The authorized description of bhakti, or devotional service..." Prabhupāda: Caitanya Mahāprabhu compared bhakti as the..., a great ocean. So when He was speaking before Rūpa Gosvāmī, He said that "It is just like a ocean. So I'll take a drop of it, and you taste it, and you'll understand what is this ocean." Just like by tasting one drop of seawater we can understand the taste of the whole ocean, similarly, Caitanya Mahāprabhu described a small portion of Bhakti-rasāmṛta-sindhu.
Bhakti-rasa-amṛta. Bhakti, devotional service, there is a rasa, taste, and the taste is amṛta, eternal. Here also, we have got taste for any relationship. Just like we have got our relationship with master and servant. So this relationship is a perverted reflection of the real master and servant.
Here it is perverted, because the master also does not love the servant, and the servant also does not love the master. The servant serves the master so long there is payment. If the payment is stopped, then no more the servant will be available. But in the eternal world, the Kṛṣṇa's servant... So that is eternal, without any payment.
Mama janmani janmanīśvare bhavatād bhaktir ahaitukī [Cc. Antya 20.29, Śikṣāṣṭaka 4]. Ahaitukī. The servants of God, or Kṛṣṇa, they serve Kṛṣṇa not for any material gain.
Ahaitukī. Therefore this word is used, ahaitukī, "without any cause of motive." This is real bhakti. Therefore this bhakti word is applicable only in relationship with God, or Kṛṣṇa. In the material world there cannot be any use of the word bhakti.
Because here the so-called devotion, service, is motivated. So this bhakti word is monopolized by Kṛṣṇa, and nobody else. Go on. Pradyumna: "The authorized description of bhakti, or devotional service, following in the footsteps of previous ācāryas, can be summarized in the following statement of Śrīla Rūpa Gosvāmī: 'First-class devotional service is known by one's tendency to be fully engaged in Kṛṣṇa consciousness, serving the Lord favorably.' " Prabhupāda: Yes. anyābhilāṣitā-śūnyaṁ jñāna-karmādy-anāvṛtam ānukūlyena kṛṣṇānuśīlanaṁ bhaktir uttamā [Brs. 1.1.11(1)] This is the first statement of bhakti given by Śrīla Rūpa Gosvāmī. The... "First-class devotional service is known by one's tendency to be fully engaged in Kṛṣṇa consciousness, serving the Lord favorably," not unfavorably. Ānukūla, prātikūla. Ānukūlyasya saṅkalpa prātikūlyam vivarjanam.