Unfortunately, when a seven year old sings this song, he or she gets the impression that obedience is the best way to show that you believe. Thousands of Muslims show obedience and do not believe at all, because they are under the law. Most unsaved children interpret Sunday School lessons and songs as rules to keep. This has no saving effect whatsoever. Whoever is under the law and is obedient to law is cursed, because the scriptures say, Cursed is every one who continues not to do every thing written in the law. For the unsaved seven year old, obedience does not show that he believes. It only shows that something motivates him to obey, whether it be the Holy Spirit or the law of Moses. When a child gets stars for attending Sunday School every week, the impression that God is pleased with performance based Christianity begins to enter into every concept the child has about God. This is essentially keeping the law. The child is then being groomed to believe that carrying a Bible to church, wearing a suit, and perfect church attendance equals God's satisfaction. Scary! There is nothing saving about keeping manmade expectations of showing obedience. So the best way to show that you believe is just simply believe God and believe that He is a rewarder of them that diligently seek Him! (Alan's comment on SFL's post on O-B-E-D-I-E-N-C-E).
ETA: And when I say bondage, I do mean bondage. Think about the words of the song.
Obedience is the very best way to show that you believe,
Doing exactly what the Lord commands, doing it happily,
Action is the key, do it immediately, joy you will receive,
Obedience is the very best way to show that you believe
We want to live pure, we want to live clean. We want to do our best.
Sweetly submitting to authority. Leaving to God the rest.
Walking in the Light, keeping our attitude right, on the narrow way...
eh, I forget the rest and probably didn't get that last line right either. But do you see it? Can you see what's lacking? It's all about doing... ME doing something. It's not about Him at all. I've nothing against kids doing the things sung about here, but why are they doing them?? Why do we as believers do what we do?? What's our motivation?? God doesn't need me to *do* for Him, or for Him to be happy with me. I am accepted in the Beloved. Period.
There's more that should be said here, but I'm searching for gracious words, LOL.