Srila Prabhupada Letter to Brahmananda, November 3rd 1972

“Yes, that is a good proposal, print many, many books in African language and distribute widely, that is real preaching work. If you sell a book to someone, that is better than your speaking to them what will your three minutes' preaching do? But if they read a book it may turn their life. Go on preaching, that is the highest perfection of activity, and do not worry for anything, Krsna is so much appreciative of this preaching work that He will give you every facility, as much as you have ambition.”