Now the covenant was not only made on Jesus Christ's side with an oath, but also on God the Father's side, that it might be for the better ground of establishment to all those that are, or are to be, the children of the promise. Methinks it is wonderful to consider that the God and Father of our souls, by Jesus Christ, should be so bent upon the salvation of sinners, that He would covenant with His Son Jesus for the security of them, and also that there should pass an oath on both sides for the confirmation of Their resolution to do good. As if the Lord had said, My Son, Thou and I have here made a covenant, that I on My part should do thus and thus, and that Thou on Thy part shouldst do so and so. Now that We may give these souls the best ground of comfort that may be, there shall pass an oath on both sides, that Our children may see that We do indeed love them. "Wherein God, willing more abundantly to show unto the heirs of promise the immutability of His counsel," in making of the covenant, "confirmed it by an oath: that we might have a strong consolation, who have fled for refuge to lay hold upon the hope set before us" (Heb 6:17,18; 7:21). Mark, the 6th Chapter saith, God confirmed His part by an oath; and the 7th saith, Christ was made or set on His office also by an oath. Again, "Once," saith God, "have I sworn by My holiness, that I will not lie unto David," "nor alter the thing that is gone out of My mouth," (Psa 89:34,35) as was before cited.
Herein you may see that God and Christ were in good earnest about the salvation of sinners; for as soon as ever the covenant was made, the next thing was, who should be bound to see all those things fulfilled which were conditioned on between the Father and the Son: the angels, they could have no hands in it; the world could not do it; the devils had rather see them damned than they would wish them the least good; thus Christ looked, and there was none to help; though the burden lay never so heavy upon His shoulder, He must bear it Himself; for there was none besides Himself to uphold, or so much as to step in to be bound, to see the conditions, before mentioned, fulfilled neither in whole nor in part (Isa 63:1-7). So that He must not be only He with whom the covenant was made, but He must also become the bondsman or surety thereof, and so stand bound to see that all and every particular thing conditioned for should be, both in manner, and matter, at the time and place, according to the agreement, duly and orderly fulfilled. Is not this grace?
Now as touching the nature of a surety and his work, in some things it is well known to most men; therefore I shall be very brief upon it.
First. You know a surety is at the bargain's making; and so was Christ–"Then was I beside Him" (Prov 8:30).
Second. A surety must consent to the terms of the agreement, or covenant; and so did Christ Jesus. Now that which He did engage should be done for sinners, according to the terms of the covenant; it was this–1. That there should be a complete satisfaction given to God for the sins of the world; for that was one great thing that was agreed upon when the covenant was made (Heb 10:5,17). 2. That Jesus Christ should, as aforesaid, bring in an everlasting righteousness to clothe the saints (His body) withal (Dan 9:24,25). Here is grace. 3. That He should take in charge to see all those forthcoming without spot or wrinkle at the day of His glorious appearing from Heaven in judgment, and to quit them before the Judgment-seat. Again,
Third. In the work of a surety there is required by the creditor that the surety should stand to what he is bound; and on the surety's side there is a consenting thereunto. 1. The creditor looks, that in case the debtor proves a bankrupt, that then the surety should engage the payment. Is not this grace? [However it is in other engagements, it is thus in this]. 2. The creditor looks that the surety should be an able man. Now our Surety was, and is, in this case, every way suitable; for He is heir of all things. 3. The creditor appoints the day, and also looks that the covenant should be kept, and the debt paid, according to the time appointed; and it is required of sureties, as well as stewards, that they be found faithful–namely, to pay the debt according to the bargain; and therefore it is said, "When the fullness of the time was come, God sent forth His Son–made under the law, to redeem them that were under the law," (Gal 4:4,5). Thus comes grace to saints. 4. The creditor looks that his money should be brought into his house, to his own habitation. Jesus, our Surety, in this also is faithful; for by His own blood, which was the payment, He is entered into the holy place, even into Heaven itself, which is God's dwelling-place, to render the value and price that was agreed upon for the salvation of sinners. But I shall speak more of this in another head, therefore I pass it. Again,
Fourth. If the surety stands bound, the debtor is at liberty; and if the law do issue out any process to take any, it will be the surety. [Though the debtor, together with the surety, is liable to pay the debt by the law of man, yet Christ our Surety only by the Covenant of Grace]. And, O! how wonderfully true was this accomplished in that, when Christ our Surety came down from Heaven, God's Law did so seize upon the Lord Jesus, and so cruelly handle Him, and so exact upon Him, that it would never let Him alone until it had accused Him and condemned Him, executed Him, and screwed His very heart's blood out of His precious heart and side; nay, and more than this too, as I shall show hereafter.
