Alfred Marshall

Civilized countries generally adopt gold or silver or both as money.

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.

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

(1) Use mathematics as shorthand language, rather than as an engine of inquiry. (2) Keep to them till you have done. (3) Translate into English. (4) Then illustrate by examples that are important in real life (5) Burn the mathematics. (6) If you can__ succeed in 4, burn 3. This I do often.