I don't want anything. In my opinion, it's nothing more than moaning after a full meal. Only when I'm full can I have such an illusion. You know, people who really have no food and are hungry don't think so much, let alone the meaning of life. He just wants to fill his stomach and let his life go on.
Therefore, you must not earnestly persuade such people, and there is no need to say such things all day, because no matter what you tell him, he will not listen. Only when you make up your mind to starve him for two or three days and let him know that there is absolutely no food in bed will he find the meaning of life by himself.
In fact, in the final analysis, the reason why a person feels that he has no desire is only because he lacks a goal motivation. He doesn't understand why he exists in this world, what his life should be like and what he can do.
So we need to help him set a goal and give him a clear direction. This goal can be imposed on him by us or achieved by him, and the latter will naturally be better. Just let him realize that his future can be brilliant, let him understand that his life can actually be meaningful, and believe that he will refuse the decadence now.