Operating revelation:
the owner of a stores selling adhesive, in order to allow a new powerful all-purpose adhesive water is well known,  glue a gold coin on the wall, and declared: "Who is take down the gold coins, gold coins who owns. Soon  the store is crowds, everyone wants to try. However, many people have spent tremendous efforts, still no use. Even a vaunted "force out the supremely" qigong master,  came and failed too. So, the good performance of the powerful all-purpose adhesive water is famous.

You will learn by analogy?