image of time as a conveyor belt that’s constantly passing us by. Each hour or week or year is like a container being carried on the belt, which we must fill as it passes, if we’re to feel that we’re making good use of our time. When there are too many activities to fit comfortably into the containers, we feel unpleasantly busy; when there are too few, we feel bored. If we keep pace with the passing containers, we congratulate ourselves for “staying on top of things” and feel like we’re justifying our existence; if we let too many pass by unfilled, we feel we’ve wasted them.
