Obviously you can't be of much help to your church if you don't show up or take part.
Some people underestimate their value of simply being present.
I especially recall an incident where my mother spent her afternoon cooking something special for me for supper. However, preoccupied with something else, I didn't bother to even show up. How this hurt my mother, to feel that her labor of love was not appreciated. Pastors often feel the same way when their flock doesn't show up. I can remember times praying and fasting for the needs of our families, working into the late hours to prepare teachings that would stir their souls, only to find their empty seat on Sunday morning.