Well I thought about this myself. But there are certain rules that apply when it comes to his God power. For example everyone has the right to life, even Satan. He could destroy Satan but that would be against the 'inalienable rights' thing. Further more, we are his Children. However hes also the supreme being, the creater, he figured out Ethics and decided he was going to be a good God. Cant you say that God is good? But anyways we are his children, we humans arent exactly brilliant, we fall short when it comes to intelligence alot. Making us in comparison to God like 3-5 yos. So if you want a good child who will prosper, you teach him right, and wrong. To be full of vain glory has no purpose in Heaven. You just want it. But its noble to want Glory for the reasons of exposing, or bettering people in one or another. Therefore we give should give the Glory to God, who is above us, but as Jesus pointing out, is servant to all. To do otherwise would creates arrogance, pride, vain glory, etc.
So like a father teaches his Child, so God is preparing us for the World to come.