There is a story about Picasso where he is in a cafe, scribbling on a napkin. A woman sitting nearby season scribbling on this napkin and asks to buy it. Picasso says that he will sell it for a substantial amount, she thinks it's too much saying: "you just drew that in 5 minutes!" Picasso says that it did not take him 5 minutes to draw that it took him 40 years.... The story goes something like that anyhow.