Raja Ram Mohan Roy helped Duff by organizing the venue and bringing in the first batch of students. He also assured the guardians that reading the King James's Bible did not necessarily imply religious conversion, unless that was based on inner spiritual conviction. Imbibing the tenets of the Scottish educational system that shaped his ideals, Duff was, unlike the missionaries and scholars at the Serampore College, wholeheartedly committed to the cause of instruction in the English language, as that facilitated the advanced study of European religion, literature and science. By carefully selecting teachers, European and Indian, who brought out the best of Christian and secular understandings, and by emphasizing advanced pedagogical techniques that emphasized the Socratic method of classroom debate, inquiry, and rational thinking, Duff and his followers established an educational system, whose impact in spreading progressive values in contemporary Bengal would be profound. Although his ultimate aim was the spread of English education, Duff was aware that a foreign language could not be mastered without command of the native language. Hence in his General Assembly's Institution (as later in his Free Church Institution), teaching and learning in the dominant vernacular Bengali language was also emphasized. Duff and his successors also underscored the necessity of sports among his students. When he introduced political economy as a subject in the curricula, his faced his church's criticism.