Jagad-guru Srila Bhaktivinode Thakura has said in his rasika-ranjana exposition of Srimad Bhagavad-Gita," The supremely compassionate Supreme Lord Krishna, whose vows are always true,while aiming His words at His friend Arjuna, manifested Srimad Bhagavad-Gita for the deliverance and redemption of the whole world. This Lord Krishna accomplished in the form of this divine discourse by revealing the deep and esoteric, essential meanings of all theVedas. In this way Srimad Bhagavad-Gita is the exclusive means of achieving the highest attainment.
Therefore Srimad Bhagavad-Gita is like the crest jewel of all the Upanisads. The Upanisads, Puranas, Srimad Bhagavatam, Vedanta-sutra and Srimad Bhagavad-Gita are all pure scriptures of unalloyed devotion to the Supreme Lord Krishna.Those individuals who are endowed with realization of the impersonal brahman will after hearing the Bhagavad-Gita accept the renounced order like Uddhava. The deep import of Srimad Bhagavad-Gita is thatone’s adhikara or qualification is always in accordance with one's own svabhava or inherent nature. For a baddha jiva or a being in bondage there is no possibility of any attaining tattva-vastu or the ultimate truth by abandoning the inate qualities of one's own adhikara. Karma, jnana and bhakti each have their own separate svabhava. Therefore it can be understood that their svarupas or spiritual forms are also different. Thus by thorough and sincere comprehensive deliberation on tattva, karma-kanda, jnana-kanda and bhakti it can be determined that there are divisions amongst them. When one renounces all lesser, inferior mundane desires and pleasures and directs one's consciousness in attaining the superior bliss of bhagavat-seva which isexclusive service unto the Supreme Lord Krishna, then karma will automatically culminate in bhakti. Therefore bhakti alone is the highest objective of all living entities along with karmaas well as karma-phala or the fruits of their karma. The knowledge of bhakti is an extremely profound and esoteric science. It is the very life breath of both karma and jnana and the only means by which the supreme goal is attained. For this reason the subject of bhakti has been positioned in the middle six chapters of the Bhagavad-Gita,thus showing that visuddha-bhakti or pure devotion is indeed the Bhagavad-Gita’s topmost objective. The verse beginning: sarva-dharman parityajya, in Bhagavad-Gita, chapter 18, verse 66 firmly establishes that saranagati or complete surrender to the Supreme Lord Krishna is indeed the final conclusion to the supreme science of the Bhagavad-Gita.