When you dream, you dialogue with aspects of yourself that normally are not with you in the daytime and you discover that you know a great deal more than you thought you did.
There's nothing wrong or evil about having a bad day. There's everything wrong with making others have to have it... with you.
One of the greatest joys of tennis is having a nice volley and not really keeping score, not really looking at the lines, but just catching up with each other.