I. Theological doctrine, describing, as it professes to do, the dealings of an all-wise Person with the human race, must be a consistent whole, each part of which reflects the oneness of the will on which it is based. What we call particular doctrines are in reality only various applications to various human conditions of one great uniform method of Divine government, which is the expression in human affairs of one Divine will. The theological statement of any part of this method ought to bear on its face the marks of the whole from which it is temporarily separated; for though it may be necessary to make now this, now that doctrine prominent, to isolate it and lay stress on it, this should be done in such a way that in each special truth the whole should, in a manner, be contained. We must be able to trace out in each the lines of the Divine action which is only fully displayed in the whole. Neglect of this not only makes our faith as a whole weak and incoherent, but deprives the doctrines themselves of the illumination and strength which are afforded by the discovery in them of mutual likeness and harmony. They become first unintelligible and then inconceivable, and the revelation of the character of God, which should be perceived in every part of His dealings with men, becomes confused and dim to us. This has been especially the case with the Atonement. In the course of religious controversy this doctrine has become separated from the rest, at one time neglected, at another over emphasized, till in its isolation it has been so stated as to be almost incredible. Men could not indeed be brought to disbelieve in forgiveness, however attained, and the conviction of remission of sins through and in the Blood of Christ has survived all the theories which have been framed to account for it; but nevertheless, the unreality of these theories has been a disaster to the Christian faith. Some of them have strained our belief in the moral attributes of God, others have given men easy thoughts of sin and its consequences. This has been so because they have treated the Atonement apart from the whole body of facts which make up the Christian conception of God and His dealings with men. In this essay the attempt will be made to present the doctrine in its relation to the other great Christian truths: to the doctrines, that is, of God, of the Incarnation, of sin.