In the next sutra the author describes the truth that pure devotional service is directed to the Supreme Personality of Godhead alone.
Sutra 33
There are no separate subdivisions of phala-bhakti devotional service, for it is one, undivided, and naturally perfect.
Commentary by Srila Bhaktivinoda Thakura
Phala-bhakti has no separate subdivisions, because it has a single undivided nature, and because, consisting of activities of passionate love for the Lord, it is naturally perfect. In these ways it is not like sadhana-bhakti. The conclusion of devotional service is given in these words:
"At that time eternally perfect love for the Supreme Personality of Godhead is manifested in the heart."
In the Taittiriya Upanisad (2.4.1) it is said:
"The Supreme Personality of Godhead is naturally full of bliss."
In the Bhakti-rasamrta-sindhu (1.2.246 and 1.2.248-249), Srila Rupa Gosvami explains:
"Some scholars argue that simply by following the principles of varna and asrama one can gradually rise to the perfections reached by practicing devotional service, but this argument is not accepted by the great authorities."
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Narada is a perfect example of a bona fide disciple. Even though his guru, Lord Brahma, was immensely powerful, still Narada did not blindly accept him as the Supreme Lord Himself.
Siddhaswarupananda - Jagad Guru Speaks
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"Some scholars recommend that knowledge and renunciation are important factors for elevating oneself to devotional service, but actually that is not a fact. Actually the cultivation of knowledge or renunciation, which are favourable for achieving a footing in Krsna consciousness, may be accepted in the beginning, but ultimately they may also come to be rejected, for devotional service is dependent on no other other then the sentiment or desire for such service. It requires nothing more than sincerity.
"It is the opinion of expert devotees that mental speculation and the artificial austerities of yoga practice may be favourable for becoming liberated from material contamination, but they will also make one's heart harder and harder. They will not help at all in the progress of devotional service. These processes are therefore not favourable for entering into the transcendental loving service of the Lord. Actually Krsna consciousness, devotional service itself, is the only way of advancing in devotional life. Devotional service is absolute. It is both the cause and the effect."
In Srimad Bhagavatam (1.2.12) it is said:
"The seriously inquisitive student or sage, well equipped with knowledge and detachment, realises that Absolute Truth by rendering devotional service in terms of what he has heard from the Vedanta-sruti."
In Srimad Bhagavatam (1.2.15), Srila Suta Gosvami explains:
"With sword in hand, intelligent men cut through the binding knots of reactionary work (karma) by remembering the Personality of Godhead. Therefore, who will not pay attention to His message?"
In Srimad Bhagavatam (1.2.16) it is also said:
"O twice born sages, by serving those devotees who are completely freed from all vice, great service is done. By such service one gains affinity for hearing the messages of Vasudeva."
In the Gopi-gita of Srimad Bhagavatam (10.31.14), the gopis explain:
"O hero, kindly distribute to us the nectar of Your lips, which enhances conjugal pleasure and vanquishes grief. That nectar is thoroughly relished by Your vibrating flute and makes people forget any other attachment."