It was at the age of 16 or 17 that he traveled to Gayā with a host of his students and there took his spiritual initiation from Īśvara Purī, a Vaiṣṇava sannyāsī and a disciple of the renowned Madhavendra Purī. Upon his return to Nadia, Nimāi Paṇḍita turned religious preacher, and his religious nature became so strongly represented that Advaita Prabhu, Śrīvāsa and others who had before the birth of Caitanya already accepted the Vaiṣṇava faith were astonished at the change of the young man. He was then no more a contending naiyāyika, a wrangling smārta and a criticising rhetorican. He swooned at the name of Kṛṣṇa and behaved as an inspired man under the influence of his religious sentiment. It has been described by Murāri Gupta, an eyewitness, that he shewed his heavenly powers in the house of Śrīvāsa Paṇḍita in the presence of hundreds of his followers, who were mostly well-read scholars.