How do we demonstrate to the world that it is God whom we serve and not something else? The answer is through a changed life. You might yawn at this simple answer. Get specific, you might say. What does it look like? Perhaps the issue can be clarified by changing the initial question. How do we demonstrate to the world that money (for example) is what we serve instead? We most certainly do not do it by thinking nice thoughts about money or singing praise songs to money. The way we worship or serve money is by being controlled by it (Matthew 6:24) .
John wrote, "Dear children, let us not love with words or tongue, but with actions and in truth." (1 Jn 3:18)
Perhaps the words of Paul can best summarize the issue. He urged the Roman believers to, "offer their bodies as living sacrifices, holy and pleasing to God as their rational act of worship." (authors trans.)
Does your life demonstrate God worship?