kalena vrindavana keli varta
lupteti tam khypnitum visesya
krpam mrtena abhise seca
deva satraiva rupanca sanatananca
Two meanings are there:
First: Before the creation of the cosmic manifestation the Lord enlighneted the heart of Lord Brahma with the details of the creation and manifested Vedic knowledge.
In exactly the same way Lord Caitanya Mahaprabhu being anxious to revive the Vrinadavana pastimes of Lord Krsna, impregnated the heart of Rupa and Sanatana with the spiritual potency. By this potency Srila Rupa and Sanatana could revive the activities of Lord Krsna in Vrindavana, activities almost lost to memory.
Sri Caitanya Mahaprabhu briefly gave some instructions to Rupa and Sanatana Gosvami about Vrindavana´s pastimes.
Second: With the course of time the pastimes of Krsna´s Vrindavana Lila and His places were covered by Yogamaya.
No one could find where these places were. Then Sacinandana Gourahari gave mercy in the heart of Rupa and Sanatana to remanifest Krsna´s Lila Sthali, and His sweet pastimes.
prema bhakti riti yata
nija ghante subhe katha
kori ache dui mahasaya
yahara sravan hoite
paramananda hoi citte
yugala madhura rasasoy
Srila Rupa Gosvamipada and Sanatana Gosvamipada, they described all the process of prema-bhakti in their unprecedented books such as: brhat-bhagavatamrtam, ujvalla-nilamani, bhakti rasamrta sindhu, lalita-madhava, vidagdha-madhava, etc.
One who listerns to this sweet pastimes of Krsna from this books becomes absorbed in estatic moods and is imersed in Yugala-Madhur-rasa. Yugala kisora prema
yeno laksan vana hena
heno prema prakasilo jara
jaya jaya sanatana
deho mora sei dana
sei ratana mora galer hara
To those who have manifested high class, estatic divine love for Yugala Kisor Kisori, I offer my unlimited heartfelt respectfull pranams unto their lotus feet, because their divine prema for Yugala-Kisor-Kisori is as like pure molten gold which has been purified a thousand times in the fire.
All glories to Sri Sanatan Gosvami, I humbly offer my prayer unto your lotus feet, please give me that very unprecedented valueable jewell which is the necklace around my neck.