Capital is that part of wealth which is devoted to obtaining further wealth.

All wealth consists of desirable things; that is, things which satisfy human wants directly or indirectly: but not all desirable things are reckoned as wealth.

Political Economy or Economics is a study of mankind in the ordinary business of life.

The hope that poverty and ignorance may gradually be extinguished derives indeed much support from the steady progress of the working classes during the 19th century.

But if inventions have increased man's power over nature very much, then the real value of money is better measured for some purposes in labour than in commodities.

The price of every thing rises and falls from time to time and place to place; and with every such change the purchasing power of money changes so far as that thing goes.

We might as well reasonably dispute whether it is the upper or the under blade of a pair of scissors that cuts a piece of paper, as whether value is governed by demand or supply.