Bet-David's chapter on purpose is not abstract. He is interested in a very specific question: what is the thing that will keep you going when the rational calculation says to stop? He argues that most people's stated reasons for wanting success are insufficient to sustain the level of effort required to achieve something genuinely extraordinary. Income, status, and lifestyle are all fine motivations. But when the business is failing, the team is mutinying, the market is collapsing, and the family is under pressure, lifestyle motivation is usually not enough. It evaporates under heat. The whys that sustain through genuine difficulty tend to be connected to something larger than the individual: a community the person feels responsible to, a problem they believe only they are positioned to solve, a generation they are determined to give something different from what they received, a promise made to someone who sacrificed for them. Bet-David speaks directly from his own why: arriving in America as a refugee with a family that had nothing, he felt a specific obligation to become something that would justify that sacrifice. That why was large enough to sustain through losses, failures, betrayals, and setbacks that would have ended the ambitions of someone powered by a smaller motivation. He is not romantic about this. A powerful why is not a guarantee of success. But its absence is close to a guarantee of stopping before the work is done.