If you dream of joy, you may not actually see joy in real life. Our dreamworld is a parallel world which can reflect lateral inversion. It makes the opposite image of reality. So if we see joy in a dream, it can be a lateral inversion of sorrow in our reality.
![](https://artmater.com/wp-content/uploads/2019/03/Scan_20190324-21-624x1024.jpg)