Why do some people suffer, but begin to enjoy happiness and then die?

People can bear hardships, but they die when they first enjoy happiness. That's because his whole spirit is relaxed, and he feels that he can enjoy happiness. Finally, he can enjoy happiness, eat, drink and be merry, and do whatever he wants. He didn't want to do what he couldn't do before, but now he wants to do something he didn't think of before. Now think about it, alas, I have indulged myself too much.