“Financial independence doesn’t come from making or having a lot of money,” says Marks. “You know what it comes from? Spending less than you make. Living within your means. It’s important to know that your anti-fragility comes from the extent to which you are not at the limit.” The trouble is, we tend to forget this when we’re thriving—or when we’re watching others thrive while we lag behind. So we edge closer to our limits and eventually stray beyond them.