You see, Momo... it's like this. Sometimes, when you've a very long street ahead of you, you think how terribly long it is and feel sure you'll never get it swept... And then you hurry. You work faster and faster, and every time you look up there seems to be just as much to sweep as before, and you try even harder…, and you panic, and in the end you're out of breath and have to stop-and still the street stretches away in from of you.