At the age of three, Roy Choudhury was admitted to a local Catholic school, and later, he was sent to the Oriental Seminary. The school was administered by the Brahmo Samaj movement, a monotheistic religion founded in 1830 in Kolkata by Ram Mohun Roy, who aimed to purify Hinduism and recover the simple worship of the Vedas. There, Roy Choudhury met student-cum-librarian Namita Chakraborty, who introduced him to Sanskrit and Bengali classics. All religious activities were banned at the school, and Roy Choudhury has said that his childhood experience made him instinctively secular.