Grigory Zinoviev,
Theses Presented to the Second World Congress of the Communist International
(1920)
“ The conquest of political power by the proletariat does not put a stop to its class struggle against the bourgeoisie; on the contrary it makes the struggle especially broad, acute and pitiless. All the groups, parties, leaders of the Labour movement, fully or partially on the side of reformism, the "centre" and so on, turn inevitably, during the most acute moments of the struggle, either to the side of the bourgeoisie or to that of the fluctuating ones, or the most dangerous add to the number of the unreliable friends of the vanquished proletariat. ”
