We should, however, beware of conceiving of worship as being confined solely to the realm of thought, for in Scripture it is linked with service.  “You shall worship the Lord your God, and serve Him only,” were our Lord’s words to Satan (Matthew 4:10). We should not separate what God has joined.  Worship is no substitute for service, nor is service substitute for worship.  But true worship must always be expressed in loving service.
-J. Oswald Sanders,Enjoying Intimacy With God