Walking the maze of joy

What gives me joy ? Is it the achievement of a desire ? The avoidance of trouble ? Maybe both. Why does the achievement of a desire give me joy? Is it because it has some intrinsic value or is it because it implies an advantage that life has bestowed on me ? So, is it really the failure of others to achieve that desire that gives me joy ? What if everyone can achieve that desire  easily? Does it still give me joy or does it wither away ? If it withers away, what do I try to do ? Do I try to think of someone who hasn't achieved that desire. Does that restore joy ? For instance,do I feel the joy of driving? Maybe a bit but not a whole lot . Why not a whole lot ? Is it because there are a lot of people who drive cars ? Then what do I do ? Do I think of the people living in the slums in some countries. Does that restore the joy of driving ?  So, is my joy really the sadistic joy of knowing the existence of those who do not have enough to eat, let alone own a car ? So, is my joy relative ? Does it depend on the existence of many who are unfortunate ? What if everyone is fortunate ? Will my joy still exist ? Maybe some of them . What defines those kinds of joy ? Do some joys not follow the conservation of energy ? Are there some joys that  gets created and multiplied or do they always transfer from one person to another ?  Like the joy of reading a book. What gives me the joy of reading the book ? Would I get the same joy if every person in the world can read that book ?   What about enjoying  movie ? Will I get the same joy if everyone can enjoy that movie ?  So, there is some joy which does not rely on someone's failures. Should I be looking forward to only these kinds of joys or should I enjoy all kinds of joys even the ones with a dark side? Does burying the dark side of some joys itself  give me a joy?