"The achievement and maintenance of the dictatorship of the proletariat is impossible without a party which is strong by reason of its solidarity and iron discipline. But iron discipline in the Party is inconceivable without unity of will, without complete and absolute unity of action on the part of all members of the Party. This does not mean, of course, that the possibility of conflicts of opinion within the Party is thereby precluded. On the contrary, iron discipline does not preclude but presupposes criticism and conflict of opinion within the Party. Least of all does it mean that discipline must be "blind." On the contrary, iron discipline does not preclude but presupposes conscious and voluntary submission, for only conscious discipline can be truly iron discipline. But after a conflict of opinion has been closed, after criticism has been exhausted and a decision has been arrived at, unity of will and unity of action of all Party members are the necessary conditions without which neither Party unity nor iron discipline in the Party is conceivable."

“If, against all expectation, Germany finds itself in a difficult situation then she can be sure that the Soviet people will come to Germany's aid and will not allow Germany to be strangled. The Soviet Union wants to see a strong Germany and we will not allow Germany to be thrown to the ground.”

“I know that the gentlemen in the enemy camp may think of me however they like. I consider it beneath me to try to change the minds of these gentlemen.”

“Tsar Alexander reached Paris.”

“The mortal sin of the Second International was not that it pursued at that time the tactics of utilising parliamentary forms of struggle, but that it overestimated the importance of these forms, that it considered them virtually the only forms; and that when the period of open revolutionary battles set in and the question of extra-parliamentary forms of struggle came to the fore, the parties of the Second International turned their backs on these new tasks, refused to shoulder them.”

“The Party is the highest form of organisation of the proletariat. The Party is the principle guiding force within the class of the proletarians and among the organisations of that class. But it does not by any means follow from this that the Party can be regarded as an end in itself, as a self-sufficient force. The Party is not only the highest form of class association of the proletarians; it is at the same time an instrument in the hands of the proletariatfor achieving the dictatorship, when that has not yet been achieved and for consolidating and expanding the dictatorship when it has already been achieved. The Party could not have risen so high in importance and could not have exerted its influence over all other forms of organisations of the proletariat, if the latter had not been confronted with the question of power, if the conditions of imperialism, the inevitability of wars, and the existence of a crisis had not yet demanded the concentration of all the forces of the proletariat at one point, the gathering of all the threads of the revolutionary movement in one spot in order to overthrow the bourgeoisie and to achieve the dictatorship of the proletariat. The proletariat needs the Party first of all as its General Staff, which it must have for the successful seizure of power. It scarcely needs proof that without a party capable of rallying around itself the mass organisations of the proletariat, and of centralising the leadership of the entire movement during the progress of the struggle , the proletariat in Russia could not have established its revolutionary dictatorship.”

“We disagreed with Zinoviev and Kamenev because we knew that the policy of amputation was fraught with great dangers for the Party, that the method of amputation, the method of blood-letting — and they demanded blood — was dangerous, infectious: today you amputate one limb, tomorrow another, the day after tomorrow a third — what will we have left in the Party?”