“We must pursue the removal of church property by any means necessary in order to secure for ourselves a fund of several hundred million gold rubles (do not forget the immense wealth of some monasteries and lauras). Without this fund any government work in general, any economic build-up in particular, and any upholding of soviet principles in Genoa especially is completely unthinkable. In order to get our hands on this fund of several hundred million gold rubles (and perhaps even several hundred billion), we must do whatever is necessary. But to do this successfully is possible only now. All considerations indicate that later on we will fail to do this, for no other time, besides that of desperate famine, will give us such a mood among the general mass of peasants that would ensure us the sympathy of this group, or, at least, would ensure us the neutralization of this group in the sense that victory in the struggle for the removal of church property unquestionably and completely will be on our side.
One clever writer on statecraft correctly said that if it is necessary for the realization of a well-known political goal to perform a series of brutal actions then it is necessary to do them in the most energetic manner and in the shortest time, because masses of people will not tolerate the protracted use of brutality. … Now victory over the reactionary clergy is assured us completely. In addition, it will be more difficult for the major part of our foreign adversaries among the Russian emigres abroad, i. e., the Socialist-Revolutionaries and the Milyukovites, to fight against us if we, precisely at this time, precisely in connection with the famine, suppress the reactionary clergy with utmost haste and ruthlessness.
Therefore, I come to the indisputable conclusion that we must precisely now smash the Black Hundreds clergy most decisively and ruthlessly and put down all resistance with such brutality that they will not forget it for several decades. … The greater the number of representatives of the reactionary clergy and the reactionary bourgeoisie that we succeed in shooting on this occasion, the better because this "audience" must precisely now be taught a lesson in such a way that they will not dare to think about any resistance whatsoever for several decades.”

Letter to Comrade Molotov for the Politburo (19 March 1922) http://www.ibiblio.org/expo/soviet.exhibit/ae2bkhun.html
Variant translation:
It is precisely now and only now, when in the starving regions people are eating human flesh, and hundreds if not thousands of corpses are littering the roads, that we can (and therefore must) carry out the confiscation of church valuables. … I come to the categorical conclusion that precisely at this moment we must give battle to the Black Hundred clergy in the most decisive and merciless manner and crush its resistance with such brutality that it will not forget it for decades to come. The greater the number of representatives of the reactionary clergy and reactionary bourgeoisie we succeed in executing for this reason, the better.
As translated in The Unknown Lenin : From the Secret Archive (1996) edited by Richard Pipes, pp. 152-4
1920s