The Best Service is Preaching
I am in due receipt of your weekly sankirtana newsletters. I am always happy to hear of increasing book sales. These reports are very encouraging to me. Our real business is to print and distribute books. By doing this business, you are all becoming recognized by Krishna. Please try to continue working so nicely for Krishna, following the rules and regulations, chanting 16 rounds, and studying my books and you will finish your business in this material world in this life and enter into the spiritual world to live with Krishna eternally.
Don’t become discouraged by any so-called problems. Make your program simple, that is to say, always make sure that you are somehow or other engaged in Krishna’s service, and the best service is preaching or engaging others in Krishna’s service. So continue in this way and be happy.
Hoping this meets you in good health,
Your ever well wisher,
A.C. Bhaktivedanta Swami
Letter May 19, 1975
Source: http://distributebooks.co.za/2011/10/24/the-best-service-is-preaching/