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, tell Him what's on your mind and in your heart, in general rejoice in Him.
Frederick BuechnerThe magic of words is that they have power to do more than convey meaning; not only do they have the power to make things clear, they make things happen.
Frederick BuechnerI am such a person of words. I've spent so much of my life trying to get it right, say it right, say it eloquently, say it truthfully, say it honestly, that when I hear it said in ways that none of those adverbs would describe I find myself so repelled that it almost shuts my mind off.
Frederick Buechner