The slogan: “Books are the basis, purity is the force, preaching is the essence and utility is the principle” is often attributed to Srila Prabhupada. But I have been unable to locate any corroborative evidence for this claim. In the BBT Vedabase it appears on a Chinese scroll, and Srila Prabhupada appears to be hearing it for the first time. Yet Krpamoya prabhu in issue 3.1 of ISKCON Communications Journal, says Srila Bhaktisiddhanta Sarasvati Thakur coined this much quoted “maxim.”