In my last post (Food for Thought . . . ) I used the example of a child driving a golf cart ten feet when told not to as a way to illustrate to ourselves our own heart toward God. I'm not going to repeat it here, but I'll assume you've read it (or you can read it by clicking on its link above).
I had another thought about it that was helpful to me. In that thought I could picture the same kid who disobeyed. But this time, instead of just being told not to drive the cart, he is told something like, "Don't drive the cart because it is out of oil and the engine will burn up (if it was a gas engine)." Or, "Don't move the cart because I discovered a sink hole under the dirt in front of it."
In any of these type of examples, what if the child, who would have otherwise driven the cart when told not to, now says, "Oh! OK," and doesn't drive the cart because they now understand the reason why not to (and, implicit in this, they agree with the reason why not to)? This further reinforces the pride and arrogance and rebellion of the child, even though they obeyed! Why? Because they obeyed because THEY understood and agreed. If they hadn't, they wouldn't have.
In the golf cart example I gave in the previous post it was clear to me that a reaction of, "Wow! He punished you like that for only driving it ten feet! That's harsh!" was a reaction that puts the person being given instruction in the place of "god" and judge. The true heart that understands authority would say, "Wow! I can't believe you drove the cart when he told you not to!"
In this example of obedience because of agreement there is nothing different. If we say, "Good boy. He didn't drive the cart," we are again focusing on the action and not the heart because he would have if he didn't agree with the reasons! He is still rebellious and proud and arrogant!
Again taking this back to us and God, it is a fair question to ask, "Do I obey when I understand why God is telling/asking something, but I don't if it doesn't make sense to me?" This is something we actually often cultivate when we say things like, "God says not to XX, and it makes sense because if we do there is a risk of YY or ZZ." This isn't to say that it is bad to explain how wise God is as a witness to His greatness, but it is dangerous if understanding is made a portion of obedience.
God is holy. He is set apart. He is the Creator. Far be it from the Creation to have the arrogance and pride and foolishness and rebelliousness to demand more before we obey than to simply know God said it.