from Selfishness, Greed, and Capitalism by Christopher Snowden

The observation that man can help others by helping himself is easily mistaken for a celebration of greed and selfishness. And since greed is morally objectionable, nothing good should come of it – the best intentions should result in the best outcomes. But Smith showed this to be untrue. Not only did those who worked for profit often do good for society, but those who professed to be working for society often did ill. ‘I have never known much good done by those who affected to trade for the public good,’ he wrote (Smith 1957: 400).