Phrases like Worship Service or Service of Worship are tautologies. To worship God means to serve Him. Basically there are two ways to do it. One way is to do things for Him that He needs to have done - run errands for Him, carry messages for Him, fight on His side, feed His lambs, and so on. The other way is to do things for Him that you need to do - sing songs for Him, create beautiful things for Him, give things up for Him, tell Him what's on your mind and in your heart, in general rejoice in Him and make a fool of yourself for Him the way lovers have always made fools of themselves for the one they love.
A Quaker Meeting, a Pontifical High Mass, the Family Service at First Presbyterian, a Holy Roller Happening - unless there is an element of joy and foolishness in the proceedings, the time would be better spent doing something useful.
- Frederick Buechner, Wishful Thinking