Our ācāryas, sad-gosvāmī, they left their service, big service, ministership, and by the order of Caitanya Mahāprabhu they went to Vṛndāvana. But what for? Going to Vṛndāvana and sleeping and eating? No, no, not for that purpose. They, rather, at home they had time to sleep more, but when they went to Vṛndāvana they were sleeping only one half-hour to two hours only. At the present moment, when a man becomes old, he requires more rest. But according to Vedic civilization, no. More no rest; more work, more work.
These gosvāmīs, they were deputed by Lord Caitanya Mahāprabhu . . . at that time this Vṛndāvana, which you have seen, now it is nice city, but during the time of Caitanya Mahāprabhu it was a big field only, that's all, nothing more than that. Everything, all Kṛṣṇa's līlā were vanished. Not vanished; it was not visible. Caitanya Mahāprabhu saw one small hole, little water, and He indicated, "This is Rādhā-kuṇḍa." Then Rādhā-kuṇḍa was discovered. So these Gosvāmīs, they were working very hard.
And special business was there, nana-śāstra-vicaraṇaika-nipunau. They were very expert in scrutinizingly studying all the Vedic literatures. Nana-śāstra. Śāstra, not ordinary knowledge. They were also reading. Nana-śāstra-vicaraṇaika-nipunau. Just like Rūpa Gosvāmī has quoted so many verses, so many incidents from different śāstras, how the biography is stated there in compiling Bhakti-rasāmṛta-sindhu, which we have translated, Nectar of Devotion. So this Nectar of Devotion . . . because formerly whatever is given under Vedic evidence, people will accept all it is correct.