All our inventions have endowed material forces with intellectual life, and degraded human life into a material force.

Since only what is material is perceptible, knowable, nothing is known of the existence of God.

The essence of the free press is the reliable, reasonable and moral nature of freedom.

The more the division of labor and the application of machinery extend, the more does competition extend among the workers, the more do their wages shrink together.

Crack-brained meddling by the authorities [can] aggravate an existing crisis.

Darwin's book is very important and serves me as a basis in natural science for the class struggle in history. One has to put up with the crude English method of development, of course. Despite all deficiencies not only is the death-blow dealt here for the first time to 'teleology' in the natural sciences, but their rational meaning is empirically explained.

If one wants to be an ox one can easily turn one's back on hum suffering and look after one's own skin.