It is not wrong, or illegal. I wish more people would stop focusing on the bad stuff and look at all the blessing and good things going on in and around their lives. The sun still shines, the flowers still bloom. We have a roof over our heads and food on the table. Some people just like to whine or get sympathy.
Joy, comes from within, like Cybrarian just said. my Joy comes from my relationship with Christ as well. I can choose to let it shine or I can choose to be cranky and whiny. Most of the time I choose to be joyful and happy and kind to others.