Don't try to leave for there's so very much to do, and you still have over eight hundred years to go on the first job.' 'But why do only unimportant things?' 'Think of all the trouble it saves. If you only do the easy and useless jobs, you'll never have to worry about the important ones which are so difficult. You just won't have the time. For there's always something to do to keep you from what you really should be doing.