First, then, we can clear away at once the cruder thoughts of the unintelligent believer in the power of prayer; and those of the scientific objector to prayer, who is not instructed in scriptural doctrine. Prayer does not imply a probable reversal of the laws of nature; but it does imply a moral government in the midst of the physical world, and the subordination of the physical to the moral under regulation of an all-wise and almighty Ruler. The question before us concerns this subordination, and the possibilities which it implies. Towards the attainment of exact conceptions here the first requisite is a clear understanding of the scientific doctrine of the government of the world by fixed law. In whatever sense we take the word "_law_" as applicable to God's government of the universe, there is no law which is fluctuating, or liable to have one signification at one time, and a quite different signification at another time; a narrower range of application at one period, and a wider range at a later. Such fluctuation would imply a suspension of a law of nature, and the conception of such a thing is inconsistent with absolute rational government, alien equally to the principles of science and of religion. Laws physical, moral, and spiritual are equally fixed laws. But the laws of the universe are a harmony, and in the midst of the interdependence of laws distinct in character, the harmony of the whole is secured by the subordination of physical law to moral and spiritual. It is in the midst of this harmonized relationship of the diverse laws of the divine government that the spirit of prayer lives, and makes good its rational consistency. And it is only on condition of acknowledgment of diverse laws, including moral with physical, that the scientific man can interpose any criticism as to the efficacy of prayer. Any denial of a moral government in the midst of the physical universe, under sway of a God of righteousness, places an objector entirely out of the sphere in which criticism can proceed. Physical law determining conditions of bodily life is fixed law; moral law deciding the conditions of right conduct in intelligent life is fixed law; spiritual law deciding the conditions of fellowship with the Father of our spirits is fixed law. The believer in the Bible has no hesitancy in acknowledgment of all this; he is a believer in fixed law in a higher and grander sense than scientific teaching indicates, and he believes in the harmony of all existence under an unchangeable government, notwithstanding all the wrong doing in the world, and the dreadful misery resulting from it. His belief in the harmony of the universe rests on his belief in the fixedness of law physical as well as moral, and moral as well as physical.