SB 10.47.33

According to intelligent authorities, this is the ultimate conclusion of all the Vedas, as well as all practice of yoga, Sāṅkhya, renunciation, austerity, sense control and truthfulness, just as the sea is the ultimate destination of all rivers. KB 10.47.33 These matters are the subject of study for the empiric philosopher or the sāṅkhya-yogī. To come to the right conclusion, sāṅkhya-yogīs undergo severe austerities and penances, practicing control of the senses and renunciation. All these different ways of determining the ultimate goal of life are compared to rivers, and Kṛṣṇa is compared to the ocean. As the rivers flow down toward the ocean, all attempts for knowledge flow toward Kṛṣṇa. After many, many births of endeavor, when one actually comes to Kṛṣṇa, he attains the perfectional stage. Kṛṣṇa says in the Bhagavad-gītā, kleśo ’dhikataras teṣām avyaktāsakta-cetasām: [Bg. 12.5] “All are pursuing the path of realizing Me, but those who have adopted courses without any bhakti find their endeavor very troublesome.” Kṛṣṇa cannot be understood unless one comes to the point of bhakti. Three paths are enunciated in the Bhagavad-gītā: karma-yoga, jṣāna-yoga and bhakti-yoga. Those who are too much addicted to fruitive activities are advised to perform actions which will bring them to bhakti. Those who are addicted to the pursuit of empiric philosophy are also advised to act in such a way that they will realize bhakti. Karma-yoga is therefore different from ordinary karma, and jṣāna-yoga is different from ordinary jṣāna. Ultimately, as stated by the Lord in the Bhagavad-gītā, bhaktyā mām abhijānāti: [Bg. 18.55] only through execution of devotional service can one understand Kṛṣṇa. The perfectional stage of devotional service was achieved by the gopīs because they did not care to know anything but Kṛṣṇa. It is confirmed in the Vedas, kasmin nu bhagavo vijṣāte sarvam idaṁ vijṣātaṁ bhavatīti. This means that simply by knowing Kṛṣṇa one automatically acquires all other knowledge.