This is recommended not only by Sanātana Gosvāmī; by Kṛṣṇa in the Bhagavad-gītā and Śukadeva Gosvāmī in Śrīmad-Bhāgavatam. Śudhyanti prabha viṣṇave namaḥ. He recommends that one, when one becomes a Vaiṣṇava by the supreme power of Viṣṇu, prabha viṣṇave namaḥ, He has got so much power that He can turn a low-grade man into a great Vaiṣṇava.
Just like Haridāsa Ṭhākura. Haridāsa Ṭhākura, he was born in Muhammadan family, and he was made Nāmācārya Haridāsa Ṭhākura by Caitanya Mahāprabhu. Nāmācārya, "the ācārya . . ." Caitanya Mahāprabhu actually appeared for glorifying the holy name of the Lord. Harer nāma harer nāma harer nāma iva kevalam (CC Adi 17.21). Kṛṣṇa-varṇaṁ tviṣākṛṣṇam (SB 11.5.32), always chanting Hare Kṛṣṇa. So Caitanya Mahāprabhu especially incarnated, advented Himself for spreading this Hare Kṛṣṇa mahā-mantra, and Haridāsa Ṭhākura, who was born in a Muhammadan family, he, he was made the namācārya, the authority of spreading this holy name.
Similarly, Sanātana Gosvāmī, they become Muhammadans. At least, formerly. His name was also changed: Sākara Mallika, Dabira Khāsa. And they were made the prime ministers of spreading this saṅkīrtana movement, the Caitanya cult, Sanātana . . . we are sitting here (in) Rūpa Gosvāmī's place. So officially, they become Muhammadan, but by the grace of Caitanya Mahāprabhu, they became Gosvāmī, Rūpa Gosvāmī. Ei chay gosāñi tāhra mui dāsa. Narottama dāsa Ṭhākura says that, "These six Gosvāmīs, anyone who accepts these six Gosvāmīs as authority, spiritual masters, I am his servant." Therefore we Gauḍīya Vaiṣṇava, we are known as Rūpānuga Vaiṣṇava, following the footsteps of Śrīla Rūpa Gosvāmī.
So this is the process. So by following the footsteps of Rūpa Gosvāmī, the whole world become . . . can become purified. Śvādo 'pi sadyaḥ sayanāya kalpate. Not only purified, but they are purified so much so that they can be allowed to perform yajñas. Because performing yajña was entrusted to high-class brāhmin who is very expert in mantra-tantra-viśāradaḥ, not ordinary brāhmin. So a Vaiṣṇava is recommended to take charge of performing sacrifices. Śvādo'pi sadyaḥ savanāya kalpate.
So this is the exalted position. Haridāsa Ṭhākura . . . actually, this was exemplified by Gadādhara . . . yes, Advaita Prabhu. Advaita Prabhu happened to be at that time the president of the brāhmin society, very learned scholar and Vaiṣṇava; and He was entrusted to be the president of brāhmin society in Śāntipūra. So when He performed the ritualistic ceremony after the death of His father, funeral ceremony, He offered the first prasādam to Haridāsa Ṭhākura.
So Haridāsa Ṭhākura was little shy accepting that, "Advaita Prabhu, You have exalted me in so many ways, but You . . ." Because according to the smārta-vidhāna, when one is performing the funeral ceremony of his father, the first portion would be offered to the best of the brāhmins. So it was offered to Haridāsa Ṭhākura. So Haridāsa Ṭhākura felt little shyness that, "Advaita Prabhu, You love me. That is all right. But You are doing all these things. You may be socially ostracized." So Advaita Prabhu said: "No. By feeding you, I am feeding one crores of best brāhmins. And let any brāhmin come to Me, I shall convince him." That was His statement.