A painted cake that cannot feed you finds its partner in a famous Cao Cao anecdote. Leading his army on a hot march with no water anywhere, and his soldiers too parched to go on, the Three Kingdoms warlord called out that a grove of plum trees lay just ahead, heavy with sour fruit. At the thought of plums their mouths watered, and they pushed on until they found water. The tale, recorded in the fifth-century collection A New Account of the Tales of the World, gave Chinese the idiom of quenching thirst by thinking of plums. Both images are comfort without substance. A trick may get you to the next well, but it does not feed you, which is why the stick stays middle and warns against taking talk for truth.