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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. Therefore the preparation of the dictatorship of the proletariat demands not only an increased struggle against all reformist and "centrist" tendencies, but a modification of the nature of this struggle.
The struggle should not be limited by an explanation of the erroneousness of such tendencies, but it should stubbornly and mercilessly denounce any leader in the Labour movement who may be manifesting such tendencies, otherwise the proletariat will not know whom it must trust in the most decisive struggle against the bourgeoisie. This struggle is such, that at any moment it may replace and has replaced, as experience has proved, the weapon of criticism by the criticism of the weapon. The least non-consecutiveness or weakness in the denunciation of those who show themselves to be reformists or "centrists", means a direct increase of the danger of the power of the proletariat being overthrown by the bourgeoisie, which will on the morrow utilise in favour of the counter-revolution all that which to short-sighted people appears only as a "theoretical difference of opinion" to-day.
