There are no absolute rules of conduct, either in peace or war. Everything depends on circumstances.

Man will become immeasurably stronger, wiser, and subtler; his body will become more harmonious, his movements more rhythmic, his voice more musical. The forms of life will become dynamically dramatic. The average human type will rise to the heights of an Aristotle, a Goethe, or a Marx. And above these heights, new peaks will rise.

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.

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.

You are pitiful isolated individuals; you are bankrupts; your role is played out. Go where you belong from now on - into the dustbin of history!

The fall of the present bureaucratic dictatorship [in the Soviet Union], if it were not replaced by a new socialist power, would thus mean a return to capitalist relations with a catastrophic decline of industry and culture.