What if you could spend hours and hours doing what you love and then get all those used-up hours returned to you at the end of your life? In other words, spend an hour and get another hour for free? It sounds like a new-age delusion or a financial scam. Romance languages don't even have a word for "saving" time. The whole notion of time is that you cannot stash it away and save it for a rainy day, or a dying day. Time slips away, and there's...