Just like Bhakti-rasāmṛta-sindhu. Śrīla Rūpa Gosvāmī, writing Bhakti-rasāmṛta-sindhu, quoting from so many Vedic literature, giving evidence. Because formerly people would take it as truth when it is proved by the version of the Vedic literature. Nowadays, they have become more and more rascal. They would not take any evidence. They will take evidence of their only senses. If they like, they will accept. If they do not like, they will . . . formerly, the society was not so much degraded. They, as soon as you give evidence from the Vedic literature, they would accept.
So these Gosvāmīs therefore were making research from the Vedic literature—from thePurāṇas, from the Vedas, from the Vedānta-sūtra and Upaniṣad, like that, Mahābhārata, Śrīmad-Bhāgavatam, and Sāma Veda, Ṛg Veda. You'll find in the Bhakti-rasāmṛta-sindhu evidences . . . nānā-śāstra-vicāraṇaika-nipuṇau sad-dharma-saṁsthāpakau. What is the . . . what was the purpose? The purpose was to establish real religious principle