So you have scientific mind and you want to use it in the service of Krsna. This is very good, and this I want that scientists step forward and preach Krsna consciousness. We are not preaching something fanaticism nor dry philosophy. Krsna consciousness is jnanam and vijnanam, practical knowledge. So I have given all the points in my books, and you should read them thoroughly.
Letter to Bhakta Dennis, 25 September, 1974