Lenin's methods [of "hard" centralism and mistrust of the working class] lead to this: the party organization substitutes itself for the party, the central committee substitutes itself for the organization, and, finally, a "dictator" substitutes himself for the central committee. … The party must seek the guarantee of its stability in its own base, in an active and self-reliant proletariat, and not in its top caucus … which the revolution may suddenly sweep away with its wing.

"Our Political Tasks" (1904), as quoted in Isaac Deutscher, The Prophet Armed (1963).