Mahāprabhu thereupon explained all the sūtras in His own way, without touching the pantheistic commentary of Śaṅkara. The keen understanding of Sārvabhauma enabled him to see the truth, beauty and harmony of the arguments in the explanations given by Caitanya, and Sārvabhauma was obliged to utter that it was the first time he had found one who could explain the Brahma-sūtras in such a simple manner. He also admitted that the commentaries of Śaṅkara never gave such natural explanations of the Vedānta-sūtras as those he had obtained from Mahāprabhu. Sārvabhauma then submitted himself as an advocate and follower. In a few days he turned out to be one of the best Vaiṣṇavas of the time. When reports of this came out, the whole of Orissa sang the praise of Kṛṣṇa Caitanya, and hundreds and hundreds came to Him and became His followers. In the meantime Mahāprabhu thought of visiting southern India, and He started with one Kṛṣṇadāsa Brāhmaṇa for the journey.
His biographers have given us details of the journey. He went first to Kūrmakṣetra, where He performed a miracle by curing a leper named Vāsudeva. He met Rāmānanda Rāya, the Governor of Vidyānagara, on the banks of the Godāvarī and had a philosophical conversation with him on the subject of prema-bhakti. He worked another miracle by touching (making them immediately disappear) the seven tāla trees that concealed Rāmacandra, the son of Daśaratha, when He shot His arrow and killed the great Vāli Rāja. Mahāprabhu preached Vaiṣṇavism and nāma-saṅkīrtana throughout the journey. At Raṅgakṣetra He stayed for the four months of the rainy season in the house of one Veṅkata Bhaṭṭa. There He converted the whole family of Veṅkata from Rāmānuja Vaiṣṇavism to kṛṣṇa-bhakti, along with the son of Veṅkata, a boy of ten years named Gopāla, who afterwards came to Vṛndāvana and became one of the Six Gosvāmīs, prophets serving under their leader Śrī Kṛṣṇa Caitanya. Trained up in Sanskrit by his uncle Prabodhānanda Sarasvatī, Gopāla wrote several books on Vaiṣṇavism.
Caitanya visited numerous places in southern India as far as Cape Comorin and returned to Purī in two years by Pāṇḍarapura on the Bhīmā. In this latter place He spiritualized one Tukārāma, who became from that time a religious preacher himself. This fact has been admitted in his ābhāṅgas, which have been collected in a volume by Mr. Satyendra Nāth Tagore of the Bombay Civil Service. During His journey He had discussions with the Buddhists, the Jains and the Māyāvādīs in several places and converted His opponents to Vaiṣṇavism.
Upon His return to Purī, Rāja Pratāparudra-deva and several paṇḍita brāhmaṇas joined the banner of Caitanya Mahāprabhu. He was now twenty-seven years of age. In His twenty-eighth year He went to Bengal as far as Gauḍa in Malda. There He picked up two great personages named Rūpa and Sanātana. Though descended from the lines of the Karṇātic brāhmaṇas, these two brothers had turned demi-Moslems by their continual contact with Hussain Shah, the then Emperor of Gauḍa. Their names had been changed by the Emperor into Dabira Khāsa and Sākara Mallika, and their master loved them heartily since they were both learned in Persian, Arabic and Sanskrit and were loyal servants of the state. The two gentlemen had found no way to come back as regular Hindus and had written to Mahāprabhu for spiritual help while He was at Purī. Mahāprabhu had written in reply that He would come to them and extricate them from their spiritual difficulties. Now that He had come to Gauḍa, both the brothers appeared before Him with their long-standing prayer. Mahāprabhu ordered them to go to Vṛndāvana and meet Him there.