The writer must earn money in order to be able to live and to write, but he must by no means live and write for the purpose of making money.

Darwin has interested us in the history of nature's technology.

It might otherwise appear paradoxical that money can be replaced by worthless paper; but that the slightest alloying of its metallic content depreciates it.

The circulation of commodities is the original precondition of the circulation of money.

The first premise of all human history is, of course, the existence of living human individuals. Thus the first fact to be established is the physical organisation of these individuals and their consequent relation to the rest of nature.

The task of abolishing the essence of Jewry is in truth the task of abolishing Jewry in civil society, abolishing the inhumanity of today's practice of life, the summit of which is the money system.