There is no royal road to science, and only those who do not dread the fatiguing climb of its steep paths have a chance of gaining its luminous summits. (Preface to the French edition).

Religion is the opium of the people translated from the German Die Religion ... ist das Opium des Volkessometimes misquoted as opiate of the people.

Natural science will in time incorporate into itself the science of man, just as the science of man will incorporate into itself natural science: there will be one science.

The alienation of man thus appeared as the fundamental evil of capitalist society.

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

The monopoly of capital becomes a fetter upon the mode of production, which has sprung up and flourished along with, and under it. Centralisation of the means of production and socialisation of labour at last reach a point where they become incompatible with there capitalist integument. This integument is burst asunder. The knell of capitalist private property sounds. The expropriators are expropriated.

This young lady, who instantly overwhelmed me with her kindness, is the ugliest creature I have seen in my entire life, with repulsive Jewish facial features.