It is not for its own sake that men desire money, but for the sake of what they can purchase with it. - Adam Smith

The value of money is in proportion to the quantity of the necessaries of life which it will purchase.

Oatmeal indeed supplies the common people of Scotland with the greatest and best part of their food, which is in general much inferior to that of their neighbours of the same rank in England.

The difference between the most dissimilar characters, between a philosopher and a common street porter, for example, seems to arise not so much from nature, as from habit, custom, and education.