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

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.

The initiative of the Five Year Plan and of the accelerated collectivization belongs entirely to the Left Opposition, in uninterrupted and sharp struggles with the Stalinists. Not having the possibility of occupying myself here with long historical researches, I will limit myself to a single illustration. The Dnieprostroy is considered with right as the highest achievement of Soviet industrialization. Yet [Joseph] Stalin and his followers ([Clim] Voroshilov and others) a few months before the beginning of the work were decided opponents of the Dnieprostroy plan.

The usages and methods of warfare are thus determined by changing circumstances and, therefore, they themselves can in nowise be eternal.

All the parties of capitalist society, all its moralists and all its sycophants will perish beneath the debris of the impending catastrophe. The only party that will survive is the party of the world socialist revolution.

I emphasized the significance of revolutionary strategy.

Everything is relative in this world, where change alone endures. Everything is better than some things and worse than others. Which you choose to compare your experiences and situation with determines whether you will be happy and grateful or sad and jealous.