All the devotees who desire to know may ask their questions to the elderly members, but still they are open to write me for all their questions… I reply each and every letter I receive… but it is better if simple questions are solved among yourselves in the ista-gosthi class. Every one of you must regularly read our books at least twice — in the morning and evening — and automatically all questions will be answered.

(Srila Prabhupada; letter to Ranadhira, January 24, 1970)