I believe that worship is obedience to God. Amos chapter five lets us know that it is not ritual acts but obedience that is at the heart of worship. It is not how loud we are or what we say but the heart of worship is what our actions say about the God we serve. Obedience is better than sacrifice is how the writer of Samuel lays it down. Worship is not a song or a hymn that talks about the attributes of God. Worship is a life surrendered to God that lives out the attributes of God in a world that is desperately in need of a God. Worship is to obedience as illumination is to revelation. You cannot have authentic worship without obedience to God. Worship is a matter of the heart and it is what we believe in our heart that determines our actions. If God is center place in our hearts then our actions are sure to reflect that. Thusly, I conclude that worship is obedience to God because God cares more about your obedience than mere words.
Scripture Reference: 1 Samuel 15:22