The display of glorious grace, or, The covenant of peace opened in fourteen sermons…

III. Christ must be God and Man, if he be a fit Mediator betwixt God and Man; i.e. he must take our Nature into Union with his Godhead, and that

(1.) That we might mystically be united to God, or draw near to God, and so be raised up into a glorious and happy State; for the Spring or Foundation of our Happiness riseth from the Hypostatical Union of the two Natures in the Person of Christ; we had never been able to have drawn near to God, nor have been united mystically to God, had not there been such an Hypostatical Union of our Nature to the Divine Nature in Christ's Person; for that was the Spring, I say, and Foundation of our Union.

(2.) Moreover Christ must be God-man, because the Covenant of Peace was transacted with Christ, not as God, simply so considered, but as God-man, or as Mediator; and as so he struck Hands with God, Christ-God, (as one observes) could not be under the Law, nor represent Man, and take his Law-place; nor could the Godhead suffer, and pay the price of Blood, nor receive a Mission, and Mandates; Christ simply considered as God, could not be a Messenger, nor be sent, nor as God could there be Promises made to him, nor any Rewards given him, but as Mediator this was done.