I Love This One Sentence

The process that produced the invention could not be labeled careful planning but it was something more than pure serendipity. Edison used most effectively in handling the press was the seemingly off-hand disclosure about what he had discovered leaving the impression that he was parting the curtain only enough to provide a glimpse of what he had actually achieved and withholding the remainder from public view. Bell invented the telephone while tinkering with acoustic telegraphy  Edison invented the phonograph while tinkered with the telephone so they both thought they were working on something else and it wind up being vastly different.