The materialist doctrine that men are products of circumstances and upbringing, and that, therefore, changed men are products of other circumstances and changed upbrinding, forgets that it is men that change circumstances and that the educator himself needs educating.

In this sense, the theory of the Communists may be summed up in the single sentence: Abolition of private property. - Manifesto of the Communist Party

Communism deprives no man of the ability to appropriate the fruits of his labour. The only thing it deprives him of is the ability to enslave others by means of such appropriations.

Private property has made us so stupid and one-sided that an object is only ours when we have it

From each according to his abilities, to each according to his needs.

Advances in science help to delegitimize the rule of kings and the power of the Church.

The only antidote to mental suffering is physical pain.