That the existence of the Soviet Union has an international revolutionary significance is a commonplace equally recognized by friends and foes.

As for us, we were never concerned with the Kantian-priestly and vegetarian-Quaker prattle about the sacredness of human life.

In the appendix to my History of the Russian Revolution I give a detailed and documented study of the ideas of the Bolshevik party on the October revolution. This study, I hope, will make it impossible in the future to ascribe to [Vladimir] Lenin the theory of Socialism in a single country.

[Joseph] Stalin closes the exposition of these [Leon Trotsky] ideas with the words, "Such are in general the characteristic features of [Vladimir] Lenin's conception of the proletarian revolution."

Learning carries within itself certain dangers because out of necessity one has to learn from one's enemies.

Simultaneously the Left Opposition in the course of several years carried on a struggle against the Stalinists in favor of collectivization.

If we had more time for discussion we should probably have made a great many more mistakes.