Śrīla Bhaktivinoda Ṭhākura says that the Lord was given lessons by a teacher named Viṣṇu and another teacher named Sudarśana. Later on, when He was a little grown up, He was under the care of Gaṅgādāsa Paṇḍita, who taught Him grammar of a higher standard. Anyone serious about studying the Sanskrit language should first learn grammar. It is said that simply to finish studying Sanskrit grammar takes at least twelve years, but once one learns the grammatical rules and regulations very nicely, all other scriptures or subject matters in Sanskrit are extremely easy to understand, for Sanskrit grammar is the gateway to education.

Śrīla Bhaktivinoda Ṭhākura says there was a commentary on grammar named Pañjī-ṭīkā that was later explained very lucidly by Śrī Caitanya Mahāprabhu.

The Caitanya-bhāgavata, Ādi-khaṇḍa, chapters four, six, seven, eight, nine and ten, are a good reference for the studious pastimes of Lord Śrī Caitanya Mahāprabhu.

From the very beginning of His childhood life Śrī Caitanya Mahāprabhu introduced the system of observing a fast on the Ekādaśī day. In the Bhakti-sandarbha, by Śrīla Jīva Gosvāmī, there is a quotation from the Skanda Purāṇa admonishing that a person who eats grains on Ekādaśī becomes a murderer of his mother, father, brother and spiritual master, and even if he is elevated to a Vaikuṇṭha planet, he falls down. On Ekādaśī, everything is cooked for Viṣṇu, including regular grains and dhal, but it is enjoined that a Vaiṣṇava should not even take viṣṇu-prasādam on Ekādaśī. It is said that a Vaiṣṇava does not accept anything eatable that is not offered to Lord Viṣṇu, but on Ekādaśī a Vaiṣṇava should not touch even mahā-prasādam offered to Viṣṇu, although such prasādam may be kept for being eaten the next day. It is strictly forbidden for one to accept any kind of grain on Ekādaśī, even if it is offered to Lord Viṣṇu.

It is a prejudice among smārta-brāhmaṇas that a widow must observe fasting on Ekādaśī but a woman who is sa-dhava — who has her husband — should not. It appears that before Lord Caitanya’s request, Śacīmātā, being sa-dhava, was not observing Ekādaśī. Śrī Caitanya Mahāprabhu, however, introduced the system that a woman, even if not a widow, must observe the Ekādaśī day and must not touch any kind of grains, even those offered to the Deity of Viṣṇu.

It is sometimes said that Lord Caitanya Mahāprabhu disapproved of the acceptance of the sannyāsa order in this Kali-yuga because in the śāstra it is said:

“In this Age of Kali, five acts are forbidden: the offering of a horse in sacrifice, the offering of a cow in sacrifice, the acceptance of the order of sannyāsa, the offering of oblations of flesh to the forefathers, and a man’s begetting children in his brother’s wife.” (Brahma-vaivarta Purāṇa, Kṛṣṇa-janma-khaṇḍa 185.180)

Nevertheless, we see that Śrī Caitanya Mahāprabhu Himself accepted sannyāsa and approved of the sannyāsa of His elder brother, Viśvarūpa. It is clearly said here, bhāla haila, — viśvarūpa sannyāsa karila/ pitṛ-kula, mātṛ-kula, — dui uddhārila. Therefore, should it be thought that Śrī Caitanya Mahāprabhu made statements that are contradictory? No, actually He did not. It is recommended that one accept sannyāsa to dedicate his life for the service of the Lord, and everyone must take that kind of sannyāsa, for by accepting such sannyāsa one renders the best service to both his paternal and maternal families. But one should not accept the sannyāsa order of the Māyāvāda school, which has practically no meaning. We find many Māyāvādī sannyāsīs simply loitering in the street thinking themselves Brahman or Nārāyaṇa and spending all day and night begging so they can fill their hungry bellies. Māyāvādī sannyāsīs have become so degraded that there is a section of them who eat everything, just like hogs and dogs. It is such degraded sannyāsa that is prohibited in this age. Actually, Śrīla Śaṅkarācārya’s principles for the acceptance of sannyāsa were very strict, but later the so-called Māyāvādī sannyāsīs became degraded because of their false philosophy, which propounds that by accepting sannyāsa one becomes Nārāyaṇa. Śrī Caitanya Mahāprabhu rejected that kind of sannyāsa. But the acceptance of sannyāsa is one of the items of the varṇāśrama-dharma. How then can it be rejected?

Betel nuts are an intoxicant, and therefore the regulative principles prohibit eating them. Śrī Caitanya Mahāprabhu’s pastime of fainting after eating betel nuts is a solid instruction to all of us that one should not touch betel nuts, even those offered to Viṣṇu, just as one should not touch grains on the Ekādaśī day. Of course, Lord Caitanya Mahāprabhu’s fainting had a particular purpose. As the Supreme Personality of Godhead, He can do whatever He likes and eat whatever He wants, but we should not imitate His pastimes.

The Supreme Personality of Godhead and His devotees who come to this world are executing a mission, and therefore sometimes they act in a way that is very difficult to understand. It is said, therefore, vaiṣṇavera kriyā-mudrā vijñeha nā bujhaya: even if one is a very learned and intelligent scholar, he cannot understand the activities of a Vaiṣṇava. A Vaiṣṇava accepts anything favorable for executing his mission. But foolish persons, not knowing the purpose of such exalted Vaiṣṇavas, indulge in criticizing them. That is forbidden. Since no one can understand what a Vaiṣṇava does for the purpose of executing his mission, to criticize such a Vaiṣṇava is the offense called sādhu-nindā.

Vanamālī Ghaṭaka, a resident of Navadvīpa and a brāhmaṇa by caste, arranged the marriage of the Lord to Lakṣmīdevī. He was formerly Viśvāmitra, who negotiated the marriage of Lord Rāmacandra, and later he was the brāhmaṇa who negotiated the marriage of Lord Kṛṣṇa with Rukmiṇī. That same brāhmaṇa acted as the marriage-maker of the Lord in caitanya-līlā.