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.
Consumption may be regarded as negative production.
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.
All labour is directed towards producing some effect.
Capital is that part of wealth which is devoted to obtaining further wealth.