Is sadness a bad feeling? Are there good types of sadness and bad types of sadness? Give an example

Yes, sadness is a bad feeling. Because sadness breaks people\'s hearts. A good type of sadness is the sadness of relief, for example, when your child gets into a good university or someone comes back alive from a war. A bad type of sadness is a bad type of sadness when a person close to you dies or your family dies. I hope there will be only good types of sadness in the future.