Wang pleaded with the priest to teach him some small trick."Which one then?"Asked the priest.Wang had noticed that the priest could walk through walls and said that he would be content to know how to do that.The priest smiled and agreed.He taught Wang a spell and bade him to repeat it so he could walk through the wall.At first,Wang dared not.The priest encouraged him to try,and Wang passed through the wall unhindered.Turning round,he found himself outside the wall.