"Man's mind," says Confucius, "is more treacherous than mounts and rivers, and more difficult to know than the sky. For with the sky you know what to expect in respect of the coming of spring, summer, autumn, and winter, and the alternation of day and night. But man hides his character behind an inscrutable appearance. There are those who appear tame and self-effacing, but conceal a terrible pride. There are those who have some special ability but appear to be stupid. There are those who are compliant and yielding but always get their objective. Some are hard outside but soft inside, and some are slow without but impatient within. Therefore those who rush forward to do the righteous thing as if they were craving for it, drop it like something hot.