From an email I received:
Edison spent a good deal of time just thinking. He fished off the end of his dock for an hour almost everyday of his life. He always fished by himself but he never caught any fish. Observers always thought it was strange that Edison would spend so much time fishing when he really wasn’t that good at it.
Late in life, he was asked about his obsession with fishing even though he was probably the worst angler anyone had ever seen.
His answer was, “I really never caught any fish because I have never used any bait.” Most people were shocked and thought he was crazy so they asked, “Why in the world would you fish without bait?” His answer? “Because when you fish without bait, people don’t bother you and neither do the fish. It provides me my best time to think.”