Mediation through Incarnation

The importance of this discussion can be seen if we recognize that in condescending, God the Son, from the beginning of creation, remained who he essentially is, all the while taking to himself those properties and characteristics sufficient to accomplish his sovereign plan. In doing so, it was not simply the assumed covenantal properties, culminating as they do in the assumption of a human nature at the incarnation, that were the conduit through which he would be Mediator. Rather, the fact that God (the Son) took on these properties constituted him as the Mediator of all creation and as the salvific Mediator of his people.

(Oliphint, K. Scott. God with Us: Divine Condescension and the Attributes of God. Wheaton, IL: Crossway, 2012. Print. 70)