Expectation. That is the true soul of art. If you create an air of anticipation and feed it properly, you will succeed. Conversely, if you gain a reputation for being too skilled... beware. The better art will be in their heads, and if you give them an ounce less than they imagined, suddenly you have failed. A man will find a single coin in the mud and talk about it for days, but when his inheritance comes and is accounted one percent less than he expected, then he will declare himself cheated.