I had just read a book about starting your own business - how to create a BP, basic accounting etc. - and the book opened with a story; the story of two cats. One cat lived at his owner's home, an easy, comfortable, boring life. The other one lived on the street, was never sure about what he could have eaten for dinner, had some scars and bad memories. But he was really living.
I lent this book to my friend, and he decided to go on with our plan. As he told me, it wasn't all the rational arguments, the data, the real world examples that did the trick, but that little fable at the start of the book.
So we left our jobs, used up all our little saved money and some from our families, failed to find the funding we needed, and our adventure didn't finish in glory. All thanks to that little piece of business fiction.