It is necessary to be able to withstand all this, to agree to any and every sacrifice, and even - if need be - to resort to all sorts of stratagems, manoeuvres and illegal methods, to evasion and subterfuges in order to penetrate the trade unions, to remain in them, and to carry on Communist work in them at all costs.
Vladimir LeninSoviet power is a new type of state in which there is no bureacracy, no police, no standing army.
Vladimir LeninThe whole struggle of our Party (and of the working class movement in Europe generally) must be directed against opportunism. The latter is not a current of opinion, not a tendency; it (opportunism) has now become the organised tool of the bourgeoisie within the working class movement.
Vladimir Lenin