The theory of Communism may be summed up in one sentence: Abolish all private property.

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.

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

As, in religion, man is governed by the products of his own brain, so in capitalistic production, he is governed by the products of his own hand.

...the Communists everywhere support every revolutionary movement against the existing social and political order of things... They openly declare that their ends can be attained only by the forcible overthrow of all existing social conditions.

The development of civilization and industry in general has always shown itself so active in the destruction of forests that everything that has been done for their conservation and production is completely insignificant in comparison.

There is no greater stupidity than for people...to marry and so surrender themselves to the small miseries of domestic and private life.