The people who succeed without sacrificing happiness rarely have more willpower; research suggests they simply hold ambition differently, treating happiness as fuel for success rather than its price, and pursuing what they love in a way that sits inside their life instead of swallowing it

The premise behind the usual list is that success and happiness sit on opposite ends of a seesaw, so that getting more of one means spending some of the other, and only a rare few have the special qualities to beat the trade. It makes for an inspiring read, b…