"If you are like everyone else, there are times when you wake in the morning feeling just as tired as when you went to bed. You fight yourself to get up in face the day and you can't explain why you haven't any pep. Other times, you may come home from work feeling "pooped" and all you want to do is have your dinner and collapse into bed. Yet if you were offered free tickets to a good show or congenial friends invited you to a party, all your weariness would vanish as if by magic. Or perhaps you've had an apparently easy day on the job, just sitting at your desk, but you feel drained of all energy. Evidently fatigue can be an elusive, unreasonable, mysterious sensation which doesn't seem to make sense."
Good Reading Rack Service, 1959