At first sight, joy seems to be connected with being different. When you receive a compliment or win an award, you experience the joy of not being the same as others. You are faster, smarter, more beautiful, and it is that difference that brings you joy. But such joy is very temporary. True joy is hidden where we are the same as other people: fragile and mortal. It is the joy of belonging to the human race. It is the joy of being with others as a friend, a companion, a fellow traveler.
This is the joy of Jesus, who is Emmanuel: God-with-us.