It might surprise some people to know that God is concerned about our joy.  Some, (in fact many?), probably consider God to be a "kill-joy!"  Nothing could be further from the truth.  God is the most joyful being in the universe and has invited us into Trinitarian joy.  If that is really true then why do we have so many grumpy people in the world and in the church?  John Piper reminds us in a great little book titled "When I Don't Desire God, How to Fight for Joy."  This book outlines the dilemma and the cure.  The reason we have to fight for joy is because joy is a by-product of pursuing the Joyful One.  The enemy and this world system suggest many other things will give us joy.  As long as we are pursuing joy in relationships, possessions and other kinds of "blessings" we will be disappointed.  This disappointment is the result of misplaced affections and expectations.  It is a fight to keep our brain and heart engaged with the Invisible God.  Our text for this Sunday will reveal more about this as we study Jesus' marvelous words "...that your joy may be full."