The Federated Republic of Europe-the United States of Europe-that is what must be. National autonomy no longer suffices. Economic evolution demands the abolition of national frontiers. If Europe is to remain split into national groups, then Imperialism will recommence its work. Only a Federated Republic of Europe can give peace to the world.

The revolution has its own laws: in the period of its culmination it pushes the most highly developed, determined and far-seeing stratum of the revolutionary class to the most advanced positions.

As long as human labor power, and, consequently, life itself, remain articles of sale and purchase, of exploitation and robbery, the principle of the “sacredness of human life” remains a shameful lie, uttered with the object of keeping the oppressed slaves in their chains.

I emphasized the significance of revolutionary strategy.

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

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

Natasha has just come up to the window from the courtyard and opened it wider so that the air may enter more freely into my room. I can see the bright green strip of grass beneath the wall, and the clear blue sky above the wall, and sunlight everywhere. Life is beautiful. Let the future generations cleanse it of all evil, oppression and violence, and enjoy it to the full.