"Return telephone calls promptly but be judicious about the time spent on the phone."

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Look sharply after your own thoughts. They come unlooked for, like a new bird seen on your trees, and, if you turn to your usual task, disappear; and you shall never find that perception again; never, I say-but perhaps years, ages, and I know not what events and worlds my lie between you and its return.

— Ralph Waldo Emerson