But, in the acts of the will, the Godhead, if we may be allowed the expression, so simplifies itself, that the harmony between the created and the uncreated, the human and the divine, may be perfect in extent as well as degree. God's will (we mean here, by the term, the act of his will in any given case) is a unity, combining together, as it were, and representing the whole of his knowledge, the whole of his love, the whole of his nature. As all objects may be, and are, present to it in a single glance, and compressed as it were into the eternal NOW, a single act of the will, embracing and adjusting all previous knowledge and all previous feeling, decides upon all, enacts all, establishes all. It is this act of the will, — an act extending to and consolidating everything else,— with which we are required to be united. Based upon infinite variety, in itself it is but one thing; and we are to unite with it as one. But as it is the unity of the Godhead, embracing the infinite variety of the Godhead, we cannot unite with God in the simplicity and unity of the will, without being virtually united with him in the infinite multiplicity of his knowledge and affection.
If these views are correct, which, in binding us to the will of God, bind us to the whole of God, we not only see how much is involved in an union with the divine will, but how fearfully hazardous it is to indulge in the slightest deviation from that will when it is once ascertained. No direction is more important than that which requires us to labor and pray for harmony with God in this respect. The other unions which have been mentioned, important and indispensable as they are, may be regarded as preparatory to this. The union of the human and divine wills is the consummation of those which have gone before. It is not surprising, therefore, that the Saviour so frequently refers to this form of union. " My meat," he says, "is to do the will of him that sent me." [John 4:34; 6:38.] And again he says, "I came down from heaven, not to do mine own will, but the will of him that sent me." 'He that doeth the will of God," says the apostle John, "abideth forever." [First Epis. of John 2:17.]
— A Treatise on Divine Union (1851) Part 5, Chapter 1.