"The great multiplication of the productions of all the different arts, in consequence of the division of labour, occasions, in a well-governed society, that universal opulence which extends itself to the lowest ranks of the people."
"It is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner, but from their regard to their own interest."
"The real price of everything... is the toil and trouble of acquiring it."
"Happiness never results from what we get, but from what we give."
"The propensity to truck, barter and exchange one thing for another is common to all men."