"Not town can live peacefully, whatever its laws," Plato wrote, "when its citizens ... do nothing but feast and drink and tire themselves out in the cares of love." But is it such a bad thing to live like this for just a little while? Just for a few months of one's life, is it so awful to travel through time with no greater ambition than to find the next lovely meal? Or to learn how to speak a language for no higher purpose than that it pleases your ear to hear it? Or to nap in a garden, in a patch of sunlight, in the middle of the day, right next to your favorite fountain? And then to do it again the next day?"