Yet, next, it would be observed, that when it is said, that one must be a believer before he can go to Christ, and make use of him for holiness and sanctification, it is not so understood and said, that one must know, that indeed he is justified by faith, before he can make any use of Christ for sanctification. One may be justified, and a believer, yea, and growing in grace through Jesus Christ, and so actually improving the grounds of sanctification, and making use of Christ for this end, and allowed thereunto, and yet win to no certainty of his union with Christ, of his justification through faith in him, nor of his faith.
But, thirdly, if it be said, How can a soul with confidence approach to Christ, for use-making of him, in reference to sanctification, that is, still doubting of his state and regeneration?
I answer, It is true, a clear sight of our interest in Christ by faith, would be a great encouragement to our confident approaching to, and use-making of him, in all things; and this consideration should move all to a more earnest search and study of the marks and evidences of their interest; a good help whereunto they will find in the forementioned book. I shall only say this here, That if the soul have an earnest desire to be sanctified wholly, and to have on the image of God, that he may glorify him, and panteth after holiness as for life, that he may look like him that is holy, and maketh this his work and study; sorrowing at nothing more than at his shortcoming; crying out and longing for the day when he shall be delivered from a body of death, and have the old man wholly crucified; he needeth not question his interest in Christ, and warrant to make use of him for every part of sanctification; for this longing desire after conformity to God's law, and panting after this spiritual life, to the end God may be exalted, Christ glorified, and others edified, will not be readily found in one that is yet in nature. It is true, I grant, some who design to establish their own righteousness, and to be justified by their own works and inherent holiness, may wish that they may be more holy and less guilty; and for some other corrupt ends, they may desire to be free of the power of some lust, which they find noxious and troublesome; and yet retain with love and desire, some other beloved lusts, and so have a heart still cleaving to the heart of some detestable thing or other. But gracious souls, as they have respect to all the commands of God, so they have not that design of being justified before God by their works; nor do they study mortification, and sanctification for any such end; nay, they no sooner discover any bias of their false deceitful hearts unto any such end, but as soon they disown it, and abhor it. So that hence believers may get some discovery of the reality of their faith and interest in Christ, and of their warrant, yea, and duty to make use of Christ for sanctification.
This premised, we come to speak something, in the general, of believer's use-making of Christ, as made of God to us sanctification. And for this end, we shall only speak a little to two things. First, We shall show upon what account it is that Christ is called our sanctification, or, "made of God to us sanctification," as the apostle's phrase is, 1 Cor. i. 30; or, what Christ hath done as Mediator, to begin, and carry on to perfection the work of sanctification in the soul. And, secondly, How the soul is to demean itself in this matter, or how the soul is to make use of, and improve what Christ hath done, for this end, that it may grow in grace, and perfect holiness in the fear of God.
As to the first, we would know, that though the work of sanctification be formally ours, yet it is wrought by another hand, as the principal efficient cause, even by the Father, Son, and Holy Ghost. The Father is said to purge the branches, that they may bring forth more fruit, John xv. 1. Hence we are said to be sanctified by God the Father, Jude 1. The Son is also called the Sanctifier, Heb. ii. 21. He sanctifieth and cleanseth the Church with the washing of water by the word, Eph. v. 26. The Spirit is also said to sanctify, 2 Thes. ii. 13. 1 Pet. i. 2. Rom. xv. 16. Hence we are said to be washed and sanctified by the Spirit of God, 1 Cor. vi. 11.
But more particularly, we are said to be sanctified in Christ, 1 Cor. i. 2; and "he is made of God to us sanctification," 1 Cor. i. 30. Let us then see in what sense this may be true. And,
1. He hath by his death and blood procured that this work of sanctification shall be wrought and carried on. For "he suffered without the gate, that he might sanctify the people with his own blood," Heb. xiii. 12. "We are saved by the washing of regeneration, and renewing of the Holy Ghost, which he shed on us abundantly, through Jesus Christ our Saviour," Titus iii. 5, 6. "He gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works," Tit. ii. 14. Thus our sanctification is the fruit of his death, and purchased by his blood. "He gave himself for his church, that he might sanctify it," Eph. v. 25, 26.
2. He dying as a cautioner and public person, believers are accounted in law to be dead to sin in him. Hence the apostle tells us, Rom. vi. 3-6, that as many of us as are baptised into Jesus Christ, were baptized into his death; and that therefore we are buried with him by baptism into death; and are planted together in the likeness of his death; yea, and that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin. Whence believers are warranted and commanded, verse 11, to reckon themselves "to be dead indeed unto sin;" and therefore sin should "not reign in their mortal bodies to fulfil the lusts thereof," verse 12. This is a sure ground of hope and comfort for believers, that Christ died thus as a public person; and that by virtue thereof, being now united to Christ by faith, they are dead to sin by law; and sin cannot challenge a dominion over them, as before their conversion it might have done, and did; for the law hath dominion over a man as long as he liveth, but no longer. Wherefore believing brethren "becoming dead to the law by the body of Christ, are married to another, even to him who is raised from the dead, that they should bring forth fruit unto God," Rom. vii. 1-4.
3. Hence it followeth, that our "old man is crucified with Christ, that the body of sin might be destroyed," Rom. vi. 6. So that this old tyrant that oppresseth the people of God, hath got his death wounds, in the crucifixion of Christ, and shall never recover his former vigour and activity, to oppress and bear down the people of God, as he did. He is now virtually, through the death of Jesus, killed and crucified, being in Christ nailed to the cross.
4. His resurrection is a pawn and pledge of this sanctification. For as he died as a public person, so he rose again as a public person. "We are buried with him by baptism, that like as Christ was raised up from the dead, by the glory of the Father, even so we also should walk in newness of life," Rom. vi. 4; and believers are said to be "planted together with him, in the likeness of his resurrection," verse 5; "and they shall live with him," verse 8; "and therefore they are to reckon themselves alive unto God, through Jesus Christ our Lord," verse 11. "We are raised up together," Eph. ii. 6.