Before the appearance of Sri Caitanya Mahāprabhu further extensive knowledge that was already given in the Bhagavatam of Radha Krishna and the residents of Vrndavana was accessed through the teachings of Visnu Swami and further details from Vallabha acarya , those from the four Kumara sampradaya and Rudra sampradaya.
However, the extent and depths of Srimati Radharani love as well that of her assistants, the Manjaris, became revealed by Sri Caitanya Mahāprabhu, and this knowledge , by His order to Nityananda prabhu , was distributed widely to one and all . Another feature of Sri Caitanya Mahaprabhu’s teachings was to make clear what the truth of Varna Ashram is , and its deliberate progressive paths towards ,niskarma karma, jnana yoga and buddhi yoga aiming towards all the levels of Bhakti yoga which culminate in pure spontaneous love that follows the residents of Vrndavana . Those who give their whole attention to Krishna in five types of relationships.
This trancendental theological position has been explained by Srila AC Bhaktivedanta Swami in his series of Caitanya Caratamrita, which can be accessed.
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