First, Unto a proper covenant it is required that it be made between
distinct persons. Such have I elsewhere proved the Father and Son to be, and in this discourse I do take that fundamental principle of our profession as granted. That there were eternal transactions in general between those distinct persons, with respect unto the salvation of mankind, hath been evinced in the foregoing Exercitation. That these were federal, or had in them the nature of a covenant, is now further to be manifested. And in general this is that which the Scripture intends, where God, that is the Father, is called by the Son his God, and where he says that he will be unto him a God and a Father; for this expression of being a God unto any one is declarative of a covenant, and is the word whereby God constantly declares his relation unto any in a way of covenant, Jeremiah 31:33, 32:38; Hosea 2:23.
For God, declaring that he will be a God unto any, engageth himself unto the exercise of his holy properties, which belong unto him as God, in their behalf and for their good; and this is not without an engagement of obedience from them. Now, this declaration the Scripture abounds in:
Psalm 16:2, “Thou hast said unto the LORD, Thou art my Lord.”
These are the words of the Son unto the Father, as is evident from verses
9-11.
Psalm 22:1, “My God, my God.”
Psalm 40:8, “I delight to do thy will, O my God.”
Psalm 45:7, “God, thy God, hath anointed thee.”
Micah 5:4, “He shall stand and feed in the strength of the LORD, in the majesty of the name of the LORD his God.”
John 20:17, “I ascend unto my Father and your Father, and to my God and your God.”
Revelation 3:12, “I will make him a pillar in the temple of my God; ..... and I will write upon him the name of my God, and the name of the city of my God.” All which expressions argue both a covenant and a subordination therein.
And on this account it is that our Savior says his Father is greater than he, John 14:28. This place, I confess, the ancients expound unanimously of the human nature only, to obviate the Arians, who ascribed unto him a divine nature, but made, and absolutely in itself inferior to the nature of God. But the inferiority of the human nature unto God or the Father is a thing so unquestionable as needed no declaration or solemn attestation, and the mention of it is no way suited unto the design of the place. But our Savior speaks with respect unto the covenant engagement that was between the Father and himself as to the work which he had to do: for therein, as we shall further manifest, the Father was the prescriber, the promiser, and lawgiver; and the Son was the undertaker upon his prescription, law, and promises. He is, indeed, in respect of his divine personality, said to be “God of God.” No more is intended hereby but that the person of the Son, as to his personality, was of the person of the Father, who communicated his nature and life unto him by eternal generation. But the Father on that account is not said to be his God, or to be a God unto him, which includes the acting of divine properties on his behalf, and a dependence on the other side on him who is so a God unto him. And this hath its sole foundation on that covenant and the execution of it which we are in the consideration of.