What do you mean this is a joke?

A real joke is that the context is different and the meaning is different. If it is said in anger, it should be contempt for the other party. If it is said under normal circumstances, it means that something is not in line with the facts, can not be realized, and can only become a laughing stock.

Don't expose your weaknesses.

We have weaknesses, but we should also put on armor. There is a saying in Sun Tzu's Art of War that you know yourself and know yourself. Then in the process of understanding the opponent, it is natural to find out the weakness of the other party. Therefore, when our life is not satisfactory, we should also fill ourselves with positive energy, don't expose our weaknesses easily, and try to shine in front of outsiders. No matter what state you are in, the enemy will not help us. It is better to live in a proud state. Personally, everyone has their own weaknesses. Since they are shortcomings, there are only two ways to solve them. The first is to hide it well, and the second is to turn your shortcomings into advantages through your own efforts. And this process needs a long process, and it needs to be hidden very deeply when it is not weakened into strength. Only by keeping your own weaknesses can you not give others an opportunity, and you can reduce your own harm and protect yourself to a certain extent. Only when people experience difficulties can they witness whether their friends are reliable. When you are down and out, some people expose their shortcomings, some people gloat, some people help each other secretly, and help you in a timely manner. For those who have ulterior motives, it will often give you a fatal blow to your weakness and make you unable to turn over from now on. Therefore, I personally suggest that you should not easily expose your weaknesses to unfamiliar people.