Quote by Adam Smith
"When the happiness or misery of others depends in any respect upon our conduct, we dare not, as self-interest might suggest, either sacrifice them to that conduct, or even sacrifice anything to them."
More from Adam Smith
"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."