Every American citizen does many things that the government of England requires; but he is not obeying the laws of England. He has no thought of such a thing. Every man of any moral worth does many things which God requires, but he may be doing so because his own judgment and the circumstances of his life indicate that it is best to so live. If so, he is not obeying God.
To obey any authority is to do what that authority requires, and because it requires it. To obey God is to submit willingly and wholeheartedly to his authority. It is taking God at his word and doing what he says; it is bringing your will and ways into harmony with his will and ways. His word must become the controlling force in your life.
God is waging war to that end: Casting down imaginations and every high thing that is exalted against the knowledge of God, and bringing every thought into captivity to the obedience of Christ. (2 Cor. 10. 5)
God demands a complete and unconditional surrender. That does not mean he will require no conditions, but it means that you are not allowed to name the terms upon which you will surrender. About all some people do is raise the flag of truce and begin to parley about whether they have to do this or that, and some openly declare that they will not do certain things. In such cases, there is no surrender to God and the war continues.
Robertson L. Whiteside 1931