In an interview with Abheek Bhattacharya, the Chinese economist Zhang Weiying says:
We human beings always seek happiness. Now there are two ways. You make yourself happy by making other people unhappy—I call that the logic of robbery. The other way, you make yourself happy by making other people happy—that’s the logic of the market. Which way do you prefer?
Or what John Stossel once called ‘The Double “Thank You” Moment’. It’s a ridiculously simple insight, which makes it all the more amazing that so many people just don’t get it.