The whole purpose of Jesus Christ coming to die was to both literally and symbolically crucify the flesh.
By crucifying the flesh, Jesus Christ demonstrated that the flesh could not be saved.
“Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.” Galatians 2:16
Salvation to the Jews
Jewish soteriology was not substitutionary in a personal way. They believed that the sacrifices, circumcision, the ordinances, the observances of Sabbath days and feast days, cleansed their flesh. Thus, through Abraham, they had their lineage from God, and through Moses they had atonement for their sins. This is why they were greatly offended by the words of Jesus in John 6:48-63.
The crucifixion of Christ accomplished a number of things:
1. The transgression of Adam was abolished.
“Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam’s transgression, who is the figure of him that was to come. 15 But not as the offence, so also is the free gift. For if through the offence of one many be dead, much more the grace of God, and the gift by grace, which is by one man, Jesus Christ, hath abounded unto many. 16 And not as it was by one that sinned, so is the gift: for the judgment was by one to condemnation, but the free gift is of many offences unto justification. 17 For if by one man’s offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ.) 18 Therefore as by the offence of one judgment came upon all men to condemnation; even so by the righteousness of one the free gift came upon all men unto justification of life. 19 For as by one man’s disobedience many were made sinners, so by the obedience of one shall many be made righteous. 20 Moreover the law entered, that the offence might abound. But where sin abounded, grace did much more abound: 21 That as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord.” Romans 5:14-21
2. The nature of Adam was given a master.
“23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. 24 O wretched man that I am! who shall deliver me from the body of this death? 25 I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.” Romans 7:23-25
3. Heaven was made accessible for the redeemed.
“15 Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace; 16 And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby: 17 And came and preached peace to you which were afar off, and to them that were nigh. 18 For through him we both have access by one Spirit unto the Father. 19 Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God; 20And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone; 21 In whom all the building fitly framed together groweth unto an holy temple in the Lord: 22 In whom ye also are builded together for an habitation of God through the Spirit.” Ephesians 2:15-22
The promise of a glorified body shows that the flesh cannot be saved.
“47 The first man is of the earth, earthy: the second man is the Lord from heaven. 48 As is the earthy, such are they also that are earthy: and as is the heavenly, such are they also that are heavenly. 49 And as we have borne the image of the earthy, we shall also bear the image of the heavenly. 50 Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God ; neither doth corruption inherit incorruption. 51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed, 52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed. 53 For this corruptible must put on incorruption, and this mortal must put on immortality.” 1 Corinthians 15:47-53
Today, we do not yet have a glorified body. We are still under the influence of Adam’s fleshly nature.
There is continual tension between the flesh and the spirit.
However, if we truly have faith in Christ that the spirit won the victory over the flesh, we will continually subject the flesh to the power of the crucifixion.
When the flesh is in bondage, the Spirit has liberty. When the flesh is granted liberty, the Spirit is placed in bondage.