The working class is revolutionary or it is nothing.

In the national struggles of the proletarians of the different countries, they point out and bring to the front the common interest of the entire proletariat, independently of all nationality.

When the sufferers learn to think, then the thinkers will learn to suffer.

There are no circumstances imaginable, not even victory, under which the proletariat should give up its possession of arms.

But the more these conscious illusions of the ruling class are shown to be false and the less they satisfy common sense, the more dogmatically they are asserted and the more deceitful, moralizing and spiritual becomes the language of established society.

There is one great fact, characteristic of this our nineteenth century, a fact which no party dares deny. On the one hand, there have started into life industrial and scientific forces which no epoch of former human history had ever suspected. On the other hand, there exist symptoms of decay, far surpassing the horrors recorded of the latter times of the Roman empire. In our days everything seems pregnant with its contrary.

Social reforms are never carried out by the weakness of the strong; but always by the strength of the weak.