tabe sanātana saba siddhānta puchilā
bhāgavata-siddhānta gūḍha sakali kahilā
tabe—thereafter; sanātana—Sanātana Gosvāmī; saba—all; siddhānta—conclusive statements; puchilā—inquired about; bhāgavata-siddhānta—the conclusive statements about devotional service mentioned in Śrīmad-Bhāgavatam; gūḍha—very confidential; sakali—all; kahilā—Śrī Caitanya Mahāprabhu described.
Thus Sanātana Gosvāmī inquired from Śrī Caitanya Mahāprabhu about all the conclusive statements concerning devotional service, and the Lord very vividly explained all the confidential meanings of Śrīmad-Bhāgavatam.
Link to this page: https://prabhupadabooks.com/cc/madhya/23/115