I have no great faith in political arithmetic, and I mean not to warrant the exactness of either of these computations. - Adam Smith

Marriage is encouraged in China, not by the profitableness of children, but by the liberty of destroying them.

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.

The trade of insurance gives great security to the fortunes of private people, and by dividing among a great many that loss which would ruin an individual, makes it fall light and easy upon the whole society.