Fun and joy are both good, but they are two different ideas you experience in life.
Yes, even you. Even depressed alcoholisms experience some joy and fun, even if they are just a short moment, sometime in their lives.
Joy and fun serve two different purposes over your life. They differ in these five ways:
1. Fun is something you experience while taking action. You may be reading or physically active. You have fun doing something.
Joy is more idle than active. You feel joy when thoughts (good sense of interpretation of events) cross you.
2. Fun births laugh. Indeed, when you have a lot of fun, you can find yourself laughing out loud or even rolling on the floor. Tears can run down your cheeks.
When you have fun, you usually make noise. Think of people who travel with Russian beaches and all their squeals.
Joy is more of inner experience, silent knowledge of peace. You have the potential to experience happiness like finding content.
3. Fun is usually (but not always) a common experience. You have fun with friends or even with strangers. You probably are not alone when you do what you describe as fun for you.
Indeed, it's a bit of fun to see the experience with the eyes of the others.
You'll find joy inside. No one else needs to be there. Joy is a completely internal job unique to each individual. It may be that someone else is obvious to you. And you will not miss your own experience of joy.
4. Fun is a moment. You are doing something fun. And then you have done fun activity. Certainly, memories can last for a long time (even forever) but the event ends.
Feeling feels like a sense of success. It's not a goal but a place where you feel emotionally or sometimes mentally. Joy lingers in your body, mind and spirit.
5. Fun is easy to describe. You share information about advertising activity and others understand what you did. They may or may not agree that activities would be fun for them. Does not matter. It was fun for you.
Joy is more abstract and leading. Others may keep track of your face and body language, but describe how you feel and define your happiness – it's not easy. Perhaps it's not even possible.