"The current interest of money is the thermometer by which the abundance or scarcity of capitals may be judged; it is the scale on which the extent of a nation's capacity for enterprises in agriculture, manufactures, and commerce, may be reckoned. Interest may be looked upon as a kind of like a sea level...under which all labor, culture, industry, commerce cease to exist. In the contemporary economy interest is a monetary tool by which central banks pretend to regulate the abundance of capital. Unfortunately in doing so they make the economy sink under the sea level. To understand this effect the rate of interest has to be investigated through its relation with money and capital."