And it can change your whole day, which could be a way to change your whole life. There really is only today, although luckily that is also the eternal now. And maybe one person in the car in the lane next to you or in line at the bank or at your kid’s baseball game will notice your casual generosity and will be touched, lifted, encouraged—in other words, slightly changed for the better—and later will let someone else go first. And this will be quantum.