"So far this making some false story for collecting money or selling book, of course we may do anything for Krishna, but that is supposed to be reserved for very advanced experts in Krishna Consciousness—they know how to catch the big fish without themselves getting wet. So it is not very much advisable to make lies just to sell book. If we simply stick to describing how wonderful is Krishna, then whatever we may lie or exaggerate, that will not be lie! But other things, lies, they will not help us to train ourselves in truthfulness. Lie to some, not to others, that is not a good philosophy. Rather the brahmanas are always truthful, even to their enemies. There is sufficient merit in our books that if you simply describe them sincerely to anyone, they will buy. That art you must develop, not art of lying. Convince them to give by your preaching the Absolute Truth, not by tricking, that is more mature stage of development of Krishna Consciousness."
Letter to Sri Govinda -- Bombay 25 December, 1972