Adam Smith

Every individual is continually exerting himself to find out the most advantageous employment for whatever capital he can command…He intends only his own gain, and he is in this, as in many other cases, led by an invisible hand to promote an end which was not part of his intention.
The Wealth of Nations
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 Wealth of Nations
Labour was the first price, the original purchase-money that was paid for all things. It was not by gold or by silver, but by labour, that all the wealth of the world was originally purchased.
The Wealth of Nations
As soon as the land of any country has all become private property, the landlords, like all other men, love to reap where they never sowed, and demand a rent even for its natural produce.
The Wealth of Nations
Consumption is the sole end and purpose of all production; and the interest of the producer ought to be attended to, only so far as it may be necessary for promoting that of the consumer.
The Wealth of Nations
Every man is, no doubt, by nature, first and principally recommended to his own care; and as he is fitter to take care of himself than of any other person, it is fit and right that it should be so.
The Theory of Moral Sentiments
When I endeavour to examine my own conduct, when I endeavour to pass sentence upon it, and either to approve or condemn it, it is evident that, in all such cases, I divide myself, as it were, into two persons; and that I, the examiner and judge, represent a different character from that other I, the person whose conduct is examined into and judged of.
The Theory of Moral Sentiments