In the case of Lord Caitanya Mahāprabhu, the Bhaṭṭācārya tested all the symptoms in the light of the śāstras. He tested as a scientist, not as a foolish sentimentalist. He observed the movement of the stomach, the beating of the heart and the breathing of the nostrils. He also felt the pulse of the Lord and saw that all His bodily activities were in complete suspension. When he put a small cotton swab before the nostrils, he found that there was a slight breathing as the fine fibers of cotton moved slightly. Thus he came to know that the Lord's unconscious trance was genuine, and he began to treat Him in the prescribed fashion. But Lord Caitanya Mahāprabhu could only be treated in a special way. He would respond only to the resounding of the holy names of the Lord by His devotees. This special treatment was unknown to Sārvabhauma Bhaṭṭācārya because the Lord was still unknown to him. When the Bhaṭṭācārya saw Him for the first time in the temple, he simply took Him to be one of many pilgrims.
In the meantime the companions of the Lord, who reached the temple a little after Him, heard of the Lord's transcendental feats and of His being carried away by the Bhaṭṭācārya. The pilgrims at the temple were still gossiping about the incident. But by chance, one of these pilgrims had met Gopīnātha Ācārya, who was known to Gadādhara Paṇḍita, and from him it was learned that the Lord was lying in an unconscious state at the residence of Sārvabhauma Bhaṭṭācārya, who happened to be the brother-in-law of Gopīnātha Ācārya. All the members of the party were introduced by Gadādhara Paṇḍita to Gopīnātha Ācārya, who took them all to the house of Bhaṭṭācārya where the Lord was lying unconscious in a spiritual trance. All the members then chanted loudly the holy name of the Lord Hari as usual, and the Lord regained His consciousness. After this, Bhaṭṭācārya received all the members of the party, including Lord Nityānanda Prabhu, and asked them to become his guests of honor. The party, including the Lord, went for a bath in the sea, and the Bhaṭṭācārya arranged for their residence and meals at the house of Kāśī Miśra. Gopīnātha Ācārya, his brother-in-law, also assisted. There were some friendly talks about the Lord's divinity between the two brothers-in-law, and in this argument Gopīnātha Ācārya, who knew the Lord before, now tried to establish the Lord as the Personality of Godhead, and the Bhaṭṭācārya tried to establish Him as one of the great devotees. Both of them argued from the angle of vision of authentic śāstras and not on the strength of sentimental vox populi. The incarnations of God are determined by authentic śāstras and not by popular votes of foolish fanatics. Because Lord Caitanya was an incarnation of God in fact, foolish fanatics have proclaimed so many so-called incarnations of God in this age without referring to authentic scriptures. But Sārvabhauma Bhaṭṭācārya or Gopīnātha Ācārya did not indulge in such foolish sentimentalism; on the contrary, both of them tried to establish or reject His divinity on the strength of authentic śāstras.
Later it was disclosed that Bhaṭṭācārya also came from the Navadvīpa area, and it was understood from him that Nīlāmbara Cakravartī, the maternal grandfather of Lord Caitanya, happened to be a class fellow of the father of Sārvabhauma Bhaṭṭācārya. In that sense, the young sannyāsī Lord Caitanya evoked paternal affection from Bhaṭṭācārya. Bhaṭṭācārya was the professor of many sannyāsīs in the order of the Śaṅkarācārya-sampradāya, and he himself also belonged to that cult. As such, the Bhaṭṭācārya desired that the young sannyāsī Lord Caitanya also hear from him about the teachings of Vedānta.
Those who are followers of the Śaṅkara cult are generally known as Vedāntists. This does not, however, mean that Vedānta is a monopoly study of the Śaṅkara-sampradāya. Vedānta is studied by all the bona fide sampradāyas, but they have their own interpretations. But generally only those in the Śaṅkara-sampradāya are known as Vedāntists, and people have no knowledge of the Vaiṣṇava Vedāntists. For this reason the Bhaktivedanta title was first offered to the author by the Vaiṣṇavas.
The Lord agreed to take lessons from Bhaṭṭācārya on the Vedānta, and they sat together in the temple of Lord Jagannātha. The Bhaṭṭācārya went on speaking continually for seven days, and the Lord heard him with all attention and did not interrupt. The Lord's silence raised some doubts in Bhaṭṭācārya's heart, and he asked the Lord how it was that He did not ask anything or comment on his explanations of Vedānta.
The Lord posed Himself before the Bhaṭṭācārya as a foolish student and pretended that He heard the Vedānta from him because the Bhaṭṭācārya felt that this was the duty of a sannyāsī. But the Lord did not agree with his lectures. By this the Lord indicated that the so-called Vedāntists amongst the Śaṅkara-sampradāya, or any other sampradāya who do not follow the instructions of Śrīla Vyāsadeva, are mechanical students of the Vedānta. They are not fully aware of that great knowledge. The explanation of the Vedānta-sūtra is given by the author himself in the text of Śrīmad-Bhāgavatam. One who has no knowledge of the Bhāgavatam will hardly be able to know what the Vedānta says.