Srila Prabhupada Letter to Cidananda, December 15th 1969

“Sankirtana and distributing Back to Godhead and our other literatures is the fieldwork of this movement. Temple worship is secondary. People are invited to come to the temple to see the behaviour of the devotees specifically in the matter of purification. There are two kinds of purification methods, external and internal. In our Krsna consciousness movement, Deity worship helps to keep us externally purified and sankirtana helps to keep us internally purified. So as far as possible we shall execute both of these processes simultaneously. And by your exemplary character, the general mass of people will be benefited. Our hearts in material condition are filled with all dirty things, and this Krsna consciousness movement is the cleansing process.”