Even before He could speak, the infant Vishvambhara displayed a nature no ordinary child possesses. Vaishnava biographers record that He would cry inconsolably in His mother's arms — sometimes for hours — and that nothing would quiet Him except the sound of women in the neighbourhood calling out "Haribol! Haribol!" ("Chant the name of Hari!"). Sachi Devi soon learned to invite the neighbourhood women to gather and chant whenever her son wept, and the crying would stop the instant the holy names were sounded, as if the child Himself were teaching Nabadwip, from the cradle, what would become the medicine for the whole world's suffering.
As a toddler He was mischievous in ways His family found both exasperating and, in hindsight, miraculous. He is said to have once been discovered eating clay from the courtyard instead of the sweets His mother had left for Him, and when Sachi Devi scolded Him and asked why, He innocently replied that since earth is used to make cooking pots and cooking pots hold the food she gives Him, He didn't see the difference — a mischievous logic that already hinted at the razor-sharp intellect to come. On another occasion two travelling thieves, seeing the extraordinarily beautiful golden child playing alone, tried to lure Him away with the promise of sweets, intending to steal the gold ornaments He wore; the stories tell that they became hopelessly lost wandering in circles around Nabadwip until, terrified and repentant, they were compelled to return the child safely to His mother's door.
Nimai's father Jagannatha Mishra had once dreamed, before his son was born, that many sannyasis had come to worship the child in his house; visiting mendicants and Vaishnavas were indeed drawn to their home, and a recurring detail in the biographies is that whenever a guest arrived and left food offerings unattended even for a moment, the infant would help Himself, forcing His embarrassed parents to keep the doors closed to visiting brahmanas — until they discovered that Nimai only ever touched food that had genuinely been offered to Krishna in the heart of the devotee bringing it, and never the food of a hypocrite or a casual visitor whose devotion was insincere. Small incidents like these were, to those with eyes to see, unmistakable signs that this was no ordinary brahmana boy.
At the age of five, Nimai was enrolled in the village pathasala and is said to have learned the entire Bengali alphabet within a single day of instruction, astonishing His teacher. By eight He was sent to study under the renowned pandit Gangadasa at his tola in the neighbouring village of Ganganagar, where within roughly two years He mastered Sanskrit vyakarana (grammar), the most demanding of the traditional sciences, along with the beginnings of rhetoric (alankara) and logic. He was, by all accounts, a restless and playful student who nevertheless grasped in a single hearing what other students needed weeks to memorise; when His father passed away while Nimai was still a boy, He continued His education largely by teaching Himself from His father's books, applying Himself especially to smriti (scriptural law) and nyaya (logic).
By His early teenage years Nimai had opened His own tola in Nabadwip and was already recognised as one of the sharpest young logicians in a town that was, at the time, the leading centre of Sanskrit scholarship in all of Bengal — a reputation that set the stage for His famous encounter with the visiting scholar Keshava Kashmiri Pandita, told in full on its own page. Alongside His scholarship, Nimai was known among the townspeople for a wit that could be gently cutting toward pretension and religious hypocrisy, and for an impish sense of humour with His young friends and fellow students that many of them would later remember, once He revealed Himself as Krishna Chaitanya, as pastimes of unmistakably divine playfulness rather than ordinary childhood mischief.
What makes these childhood pastimes precious to Gaudiya Vaishnavas is not merely their charm but their function: they establish, before the Lord ever lifts His arms in sankirtana, that the child born in Sachi Devi's house was never an ordinary brahmana boy who later "became" enlightened — He was, from the very first cry that only the holy name could quiet, Krishna Himself, playing the part of a human child so that Nabadwip, and through Nabadwip the entire world, would have a human life to look to, learn from and love.