Krishna das Kaviraj Goswami explains this internal purpose of the Lord was revealed to the world in its most perfect and complete form through the descent of Lalita sakhi in the form of Swarupa Damodar Goswami. Lalita sakhi is a direct expansion of Srimati Radharani. She is non-different than Srimati Radharani. And similarly, Swarupa Damodar Goswami is non different, he is the direct expansion in the mood of servitude of the internal ecstatic love of Sri Radha which is in the heart of Lord Chaitanya Mahaprabhu. Swarupa Damodar Goswami was constant companion Lord Chaitanya and His later pastimes in Jagganath Puri. And he is the prominent figure of all Lord Chaitanya Mahaprabhu’s associates. Murari Gupta made a note book where he recorded the early pastimes of Sri Chaitanya Mahaprabhu in Navadvip and Swarupa Damodar Goswami who is the personal secretary of Lord Chaitanya recorded in his notebook the pastimes and teachings of Lord Chaitanya in Puri. What we read in Chaitanya Mangal, Chaitanya Bhagvat, Chaitanya-charitamrita consists from the basic foundation of these writings.
