The voice within us which demands our acceptance of religion makes no direct appeal to the evidence supplied by the senses. We are called on to believe in a supreme law of duty on pain of being lowered before our own consciences. And this law of duty goes on to assert its own supremacy over all things that exist, and that not as an accidental fact, but as inherent in its essence. And this supremacy cannot be other than an accidental fact unless it be not only actual but intended. And intention implies personality; and the law thus shows itself to be a Supreme Being, claiming our reverence, and asserting Himself to be the Creator, the Ruler, and the Judge of all things that are. And this same voice within us asserts that we are responsible to Him for all our conduct, and are capable of that responsibility because free to choose what that conduct shall be. We are to believe not because the truth of this voice is proved independently of itself, but simply because we are commanded. Corroborative evidence may be looked for elsewhere, but the main, the primary evidence is within the soul. Hence the strength of this belief depends on ourselves and on our own character. To every man the voice speaks. But its authority is felt in proportion to the spirituality of each who hears. Its acceptance is bound up in some way with our own wills. How far it is a matter of choice to believe or to disbelieve it is not possible to define. The will lies hidden as it were behind the emotions, the affections, the nobler impulses. The conscience shades off into the other faculties, and we cannot always isolate it from the rest. But though it be impossible to say precisely how the will is concerned in the spiritual belief, there can be no doubt that it always takes its part in such belief. It is the keen conscience, it is the will that can be moved to its depths by the conscience, that grasp most strongly the certainty of the law of duty. It is the man with the strongest and noblest aspirations, the man who sees the beauty of humility, the man who feels most strongly the deep peace of self-sacrifice, _that_ is the man who finds the voice within most irresistible. It is not by any means always the man who lives the most correct life; correctness of life may be due to natural and not to spiritual causes. And the man whom we should find faultless in point of morals may yet be wanting in spiritual depth, and not have as yet, and perhaps may not have to the last, the spiritual faculty strong within him. But the man, even if he have many and grievous faults, who nevertheless is keenly susceptible of higher things, is the one to whom the voice within speaks with authority not to be gainsaid, and to him that voice is final.