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

Everything is relative in this world, where change alone endures.

In inner-party politics, these methods lead, as we shall yet see, to this: the party organization substitutes itself for the party, the central committee substitutes itself for the organization, and, finally, a dictator substitutes himself for the central committee.

The task of the proletariat is to create a still more powerful fatherland with a far greater power of resistance, the Republican United States of Europe, as the foundation of the United States of the World.

Our differences with [Joseph] Stalin are entirely of a strategical character.

...capitalism does live by crises and booms, just as a human being lives by inhaling and exhaling.

The Soviet Union needs thinking and critical friends, such as are capable not only of singing hymns in the hours of success, but of not shrinking in the hour of defeat and danger.