we often observe that there is abundance of capital to be had at low rates of interest, while there are also large numbers of artisans starving for w… - William Stanley Jevons

As there are so many who talk prose without knowing it, or, again, who syllogize without having the least idea what a syllogism is, so economists have long been mathematicians without being aware of the fact.

It is very commonly urged, that the failing supply of coal will be met by new modes of using it efficiently and economically. ...It is wholly a confusion of ideas to suppose that the economical use of fuel is equivalent to a diminished consumption. The very contrary is the truth.

One of the first and most difficult steps in a science is to conceive clearly the nature of the magnitudes about which we are arguing.