Should you marry that person? Quit a steady career to retrain? Move across the country, away from aging parents? Sit with any of these and watch your mind spin. You weigh what you'd gain against what you'd lose. You run the numbers. And still no answer arrives.

Big decisions are rare, life-shaping, and hard to undo, and they refuse to be solved like a sum

Should you marry that person? Quit a steady career to retrain? Move across the country, away from aging parents? Sit with any of these and watch your mind spin. You weigh what…