People should be cautious in prosperity and calm in adversity. My dear friend is a stupid brother. Interpretation: People should be cautious in prosperity and calm in adversity. What is expressed here is a situation to prevent the ups and downs. A person's confidence will often multiply after success, but at this time, we should be more cautious and take it seriously to avoid decline and reversal. Don't become complacent, arrogant, comfortable and arrogant.