First. The suitableness of it lieth in the fit application thereof to all the parts of thraldom and bondage. Have we sinned? Christ had our sins laid upon his back; yea, of God was made, that is, reputed, sin for us (Isa 53; 2 Cor 5:21). Were we under the curse of the law by reason of sin? Christ was made under the law, and bare the curse thereof to redeem (Gal 4:4, 3:13; Rom 3:24). Had sin set us at an indefinite distance from God? Christ has become, by the price of his redeeming blood, a reconciler of man to God again (Col 1:20). Were we by sin subject to death? Christ died the death to set us free therefrom (Rom 6:23). Had our sins betrayed us into and under Satan's slavery? Christ has spoiled and destroyed this work, and made us free citizens of heaven (Acts 26:18; 2 Tim 2:26; Heb 2:14; Eph 2:19). Thus was our Redeemer made, as to those things, a suitable recoverer, taking all and missing nothing that stood in the way of our happiness; according to that a little below the text, 'And he shall redeem Israel from all his iniquities,' that is, from them, together with their evil fruits.
Second. Now as to the sufficiency that was in this suitableness, that is declared by his resurrection, by his ascension, by his exaltation to the right hand of God; that is also declared by God's putting all things under his feet, and by giving of him to be head over all things for his redeemed's sake. It is also further declared in that God now threateneth none but those that refuse to take Jesus for their Saviour, and for that he is resolved to make his foes his footstool. What are more natural consequences flowing from anything, than that by these things is the sufficiency of the suitableness of redemption by Christ proved? For all these things followed Christ, for, or because he humbled himself to the death of the cross, that he might become a Redeemer; therefore God raised him up, took him to his throne, and gave him glory, that your faith and hope might be in God by him (Phil 2).
But alas! what need we stand to prove the sun is light, the fire hot, the water wet? What was done by him was done by God, for he was true God; and what comparison can there be betwixt God and the creature, betwixt the worth of God's acts, and the merit of the sin of poor man! And can death, or sin, or the grave hold us, when God saith, 'Give up?' Yea, where is that, or he, that shall call into question the superabounding sufficiency that is in the merit of Christ, when God continueth to discharge, day by day, yea, hourly, and every moment, sinners from their sin, and death, and hell, for the sake of the redemption that is obtained for us by Christ?
God be thanked here is plenty; but no want of anything! Enough and to spare! It will be with the merit of Christ, even at the end of the world, as it was with the five loaves and two fishes, after the five thousand men, besides women and children, had sufficiently eaten thereof. There was, to the view of all at last, more than showed itself at fist. At first there was but five loaves and two fishes, which a lad carried. At last there were twelve baskets full, the weight of which, I suppose, not the strongest man could bear away. Nay, I am persuaded, that at the end of the world, when the damned shall see what a sufficiency there is left of merit in Christ, besides what was bestowed upon them that were saved by him, they will run mad for anguish of heart to think what fools they were not to come to him, and trust in him that they might be saved, as their fellow-sinners did. But this is revealed that Israel, that the godly may hope and expect. Let Israel therefore hope in the Lord, for with him is plenteous redemption.
[Amplifying reasons as a conclusion of the whole.]
Now as this last clause, as I termed it, is the amplification of the reason going before; so itself yieldeth amplifying reasons as a conclusion of the whole. For,
First. Add redemption unto mercy, and then things still are heightened and made greater. And it must, because the text adds it, and because both the nature of God, the holiness of his law, and the present state of the sinner that is to be saved, requireth that it should be so. God is justice as well as mercy; the law is holy and just; that man that is to be saved is not only a sinner, but polluted. Now, then, that mercy and justice may meet and kiss in the salvation of the sinner, there must be a redemption; that the sinner may be saved, and the law retain its sanction and authority, there must be a redemption; that the sinner may be purged as well as pardoned, there must be a redemption. And, I say, as there must, so there is: 'For with the Lord there is mercy, and with him is plenteous redemption.' Mercy is the original, the cause, and the manager of our redemption. Redemption is the manifestation, and the completing of that mercy. If there had been no mercy, there had been no redemption. Mercy had been defective as to us, or must have offered violence to the law and justice of God, and have saved us contrary to that word, 'In the day thou eatest thou shalt die,' and 'Cursed is every one that continueth not in all things written in the book of the law to do them.' But now, redemption coming in by mercy, the sin is done away, and the sinner saved, in a way of righteousness.
Second. By law as well as grace; that is, in a way of justice as well as in a way of mercy. Hence it saith we are 'justified freely by his grace, through the redemption that is in Christ Jesus' (Rom 3:24). Through the redemption that is in Jesus Christ, whom God hath set forth to be a propitiation through faith in his blood, and so to show the world the equity of his proceeding with sinners in the saving of their souls. As if God should say to all those who stumble at the salvation of sinners by grace, Behold, I act according to law and justice. For of grace I save them through a redemption, and therefore am faithful and just to my law, as well as free and liberal of my mercy. Wherefore thus I declare I am righteous, faithful, and just in passing over or remitting of sin. Nay, the matter so standeth now betwixt me and the sinful world, that I could not be just if I did not justify him that hath faith in the blood of Jesus, since by that blood my justice is appeased for all that this or that sinner has done against my law!
This is a way that God, nor any child of his, need be ashamed of before any that shall call in question the legality and justice of this procedure. For why may not God be merciful, and why may not God be just? And since he can be both merciful and just in the salvation of sinners, why may he not also save them from death and hell? Christ is God's salvation, and to show that he is not ashamed of him, he hath presented him, and the way of redemption by him, before the face of all people (Luke 2:30-32). Nor is the Son, who is become, with respect to the act of redemption, the author of eternal salvation, ashamed of this his doings. 'I gave my back to the smiters,' saith he, 'and my cheeks to them that plucked off the hair; I hid not my face from shame and smiting' (Isa 50:6). This he speaks to show what were some of his sufferings when he engaged in the work of our redemption, and how heartily he did bear and go through them. 'For,' says he, 'the Lord God will help me,' that is, justify me in it, 'therefore shall I not be confounded, therefore have I set my face like a flint, and I know that I shall not be ashamed' (v 7). And if God, and his Son Jesus Christ, are neither of them ashamed to own this way of salvation, why should the sinners concerned thereabout be afraid thereupon to venture their soul? I know, saith he, 'I shall not be ashamed'; I shall not, that is, when all things come to light, and everything shall appear above board; when the heart and soul of this undertaking of mine shall be proclaimed upon the house-tops, I know I shall not be ashamed.
It was also upon this account that Paul said he was not ashamed of the gospel (Rom 1). For he knew that it was a declaration of the highest act of wisdom that ever God did spread before the face of the sons of men. And of what wisdom is the gospel a declaration but of that of forgiveness of sins by grace, through the redemption that is by the blood of Jesus Christ? 'In whom we have redemption through his blood,' even 'the forgiveness of sins, according to the riches of his grace, wherein he hath abounded toward us in all wisdom and prudence' (Eph 1:7,8).