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Actually, a vast number of men, even when they are in the springtime of their lives, “kill” time by reading “shockers”, solving crossword puzzles, studying the worthless tips of racetrack touts, by loafing on the street corner or in pubs and by scores of other time-wasting devices. In most cases, time is all they have. It is their only capital. And their steady desire is to destroy it. Speaking of crossword puzzles, Mr. Esme Wingfield-Stratford truly says: “Energy must find an outlet somewhere, even in the most atrophied mind, and that it may drain itself easily and agreeably into vacancy, puzzles and competitions are devised, culminating in the invention of the crossword, perhaps the most scientific of all time-killing devices, with its capacity for holding the attention just sufficiently to keep the brain employed in the most useless of all possible activities for hours on end.
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Herbert N. Casson (Brain Building for Achievement)