I. How the covenant of grace was administered under the Old Testament. As God has always had a church in the world, in the earliest ages thereof, which has been the seat of his special presence, and been favoured with the displays of his glory; so he has made known, and applied to them, the blessings of salvation, or the promises of this covenant, in which they are contained. How he has done this, is particularly considered in this answer; in which there is something supposed, namely, that it was absolutely necessary, for the salvation of the elect, that God should, some way or other, reveal Christ to them, by whom they were to obtain remission of sins; for he was to be the object of their faith, as well as the fountain of their blessedness. This he could not have been, unless he had taken some methods to lead the world into the knowledge of his Person, and that work he designed to engage in, whereby they, who lived before his incarnation, might be encouraged to look for the benefits which he would procure, by what he was to do and suffer, in order thereunto. Now, that he has done so, and that the method which he has taken therein, was sufficient to build up his elect in the faith of the promised Messiah, is what we are particularly to consider, and so shall shew, 1. That God revealed Christ, and the blessings of the covenant of grace, to his church of old. There were two ways by which he did this; one was by express words, or an intimation given from heaven, that the Messiah, the prince of life, should, in the fulness of time, take our nature, and dwell among us; and that what he was then to be, and do, should be conducive to the salvation of those who lived before his incarnation, as much as though he had done this from the beginning of the world: the other was, by types, or significant ordinances, which are only different ways of discovering the same important doctrines to them.