"One product is always ultimately bought with another, even when paid for in the first instance with money."

“What is the motive which operates in every man's breast to counteract the impulse towards the gratification of his wants and appetites?”

“The command of a large sum is a dangerous temptation to a national administration. Though accumulated at their expense, the people rarely, if ever profit by it: yet in point of fact, all value, and consequently, all wealth, originates with the people.”

“In times of political confusion, and under an arbitrary government, many will prefer to keep their capital inactive, concealed, and unproductive, either of profit or gratification, rather than run the risk of its display. This latter evil is never felt under a good government.”

“How many other opinions, as universally prevailing and as much respected, will in like manner pass away?”

“Wherefore it is impossible to succeed in comparing wealth of different eras or different nations. This, in political economy, like squaring the circle in mathematics, is impracticable, for want of a common mean or measure to go by.”

“Freedoms and apprenticeships are likewise expedients of police,not of that wholesome branch of police, whose object is the maintenance of the public and private security, and which is neither costly nor vexatious; but of that sort of police which bad governments employ to preserve or extend their personal authority at any expense.”