CC Madhya 1.34
vrajera nigūḍha bhakti karila pracāra
The Gosvāmīs carried out the preaching work of devotional service on the basis of an analytical study of all confidential Vedic literatures. This was in compliance with the order of Śrī Caitanya Mahāprabhu. Thus one can understand the most confidential devotional service of Vṛndāvana.
This proves that bona fide devotional service is based on the conclusions of the Vedic literature. It is not based on the type of sentiment exhibited by the prākṛta-sahajiyās. The prākṛta-sahajiyās do not consult the Vedic literatures, and they are debauchees, woman-hunters and smokers of gañjā. Sometimes they give a theatrical performance and cry for the Lord with tears in their eyes. Of course, all scriptural conclusions are washed off by these tears. The prākṛta-sahajiyās do not realize that they are violating the orders of Śrī Caitanya Mahāprabhu, who specifically said that to understand Vṛndāvana and the pastimes of Vṛndāvana one must have sufficient knowledge of the śāstras (Vedic literatures). As stated in Śrīmad-Bhāgavatam (1.2.12), bhaktyā śruta-gṛhītayā. This means that devotional service is acquired from Vedic knowledge. Tac chraddadhānāḥ munayaḥ. Devotees who are actually serious attain bhakti, scientific devotional service, by hearing Vedic literatures (bhaktyā śruta-gṛhītayā). It is not that one should create something out of sentimentality, become a sahajiyā and advocate such concocted devotional service. However, Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura considered such sahajiyās to be more favorable than the impersonalists, who are hopelessly atheistic. The impersonalists have no idea of the Supreme Personality of Godhead. The position of the sahajiyās is far better than that of the Māyāvādī sannyāsīs. Although the sahajiyās do not think much of Vedic knowledge, they nonetheless have accepted Lord Kṛṣṇa as the Supreme Lord. Unfortunately, they mislead others from authentic devotional service.