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

The most reckless and treacherous of all theorists is he who professes to let facts and figures speak for themselves.

In common use almost every word has many shades of meaning, and therefore needs to be interpreted by the context.

The love for money is only one among many.

The commercial storm leaves its path strewn with ruin. When it is over there is calm, but a dull, heavy calm.

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.