“With the breakdown of money economy the practice of international barter is becoming prevalent.”

“Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants – but debt is the money of slaves.”

“The calculative exactness of practical life which the money economy has brought about corresponds to the ideal of natural science: to transform the world by mathematical formulas. Only money economy has filled the days of so many people with weighing, calculating, with numerical determinations, with a reduction of qualitative values to quantitative ones.”

“There was no money economy in Egypt, and all exchange of goods was carried out by barter. Each citizen paid a tax in kind of everyt5hing he produced, and the wealth of the pharaoh thus consisted of the grain, livestock, and other goods that he took as taxes. He also received metals and other goods as tribute or in trade from abroad.”

“In nature's economy the currency is not money, it is life.”

“Economy is idealism in its most practical form.”