Feign Madness, But Keep Your Balance

The man who survived danger by pretending to be insane or mentally deficient. It's not fun to be thought of as stupid, but it is safer than to be reckoned intelligent and therefore dangerous. Hide behind the mask of a fool, a drunk, or a madman to create confusion about your intentions and motivations. Lure your opponent into underestimating your ability until, overconfident, he drops his guard. Then you may attack.

Related story

During the final years of Emperor Yang of the Sui Dynasty there appeared a ballad that foretold the fall of the house of Sui and the ascent of a man named Li as emperor. The ballad became immensely popular among the disaffected subjects of Emperor Yang's infamous rule. The emperor, being superstitious and believing in the prophecy himself, began a campaign to search out and execute anyone of importance with the surname Li. He had numerous ministers and officials along with their entire families put to the sword.

A minor official whose name was, Li Yuan, was serving as superintendent in the provinces when he was summoned to the court. Li Yuan delayed appearing in court by claiming poor health. Li Yuan had a niece who was a palace maid and one day the emperor asked her where her uncle Li has been. The lady replied that her uncle was ill. The emperor said: "I wonder if he is courting death?" When Li Yuan heard this he was certain that if he obeyed the summons to court he would never return. Thereupon he feigned madness and pretended to become an incorrigible drunk. When the imperial spies reported Li's behavior the emperor thought that a madmen could never fulfill the prophesy and was no longer suspicious of Li. Surprisingly, two years later the Sui emperor placed Li in charge of a field army to defend the empire against barbarian incursions. Li fought bravely, won the respect of his troops, marched on the capital, and went on to found the illustrious Tang dynasty thus fulfilling the prophecy.