The world is constantly changing and you never know what will happen to you next. Today's gorgeous scenery may be messed up tomorrow. Today is gloomy, tomorrow may be sunny. The ancients said: When you understand impermanence, you won't be haughty. A truly wise person is never arrogant, no matter how great achievements or glory he/she has. Virtue does not match, there will be disasters. The more wealth and the higher the rank, the more you have to work hard to cultivate morality and make yourself worthy of the favour of the heavens. If one's virtue is not enough, arrogant, sooner or later will perish.