Srila Bhakti Siddhanta Sarasvati Gosvami Thakur Prabhupada was bound to write one letter to Kunja das, there indirectly he identified himself as Nayan Mani Manjari, just like the eyeball of Srimati Radharani. What does it mean by Nayani Mani? We know that without eyeball one can not see, so that is the case with Srimati Radharani, she loves her so much that without watching her she feels blind.
The topmost effort to satisfy the Supreme Lord wholeheartedly by the help of all sense organs and mind is called genuine bhakti. Unending spontaneous natural seva by the help of all sense organs and mind is called Uttama bhakti. Only and only this kind of spontaneous love affair can be seen in those Brajavasis. Specially parakiya madhurya rasa bhava can only be found in those Brajagopikas, because all their hearts and souls are found sold unto the Lotus feet of Sri Krsna. Only in Braja dhama this kind of exclusive and excellent love affair can be seen amoung Sri Krsna and Brajagopikas, nowhere else in the whole world. This kind of nonstop seva mood we have seen in Srila Prabhupada. What is exact Radha anugatya that we can see in the life lila of Srila Prabhupada.
Gaura Hari Haribol