The new covenant results in the change from a filthy robe of immorality and violence to a white robe, a robe of righteousness and eternal life.

The Sabbath is fulfilled in us because we are entering God's rest, not one day out of seven but every day throughout eternity. God is resting, and we are becoming an eternal part of His rest through Christ Jesus.

To attempt to add to our rest in God the letter of the fourth commandment, or the dietary ordinances, or circumcision, or observance of the feast days, or any of the other statutes of the Mosaic Law, is not a sin. But it may bring confusion to what should be a simple following of the Lord.

There are believers, both Jewish and Gentiles, who keep the Sabbath-day commandment by doing no work of any kind on Saturday, who observe Passover, the Day of Atonement, and the feast of Tabernacles. These practices may be a blessing to them while Christ, who is the fulfillment of all these, is being formed in them.

The Lord loves His people who observe some of the ordinances of the Law of Moses, and a morality that works by the letter of the Law is better than the current teaching that produces little or no righteous behavior.

The new covenant of death and resurrection has a goal and a process infinitely higher than any previous covenant. There is no religious practice that can add to or improve on the process of death and resurrection.

Keeping the Mosaic statutes does not lead to the goal of bodily righteousness, immortality, and glory. Only the death and resurrection of the inner nature can produce the first resurrection.

Since the process of death and resurrection derives its authority from the blood of the Lord, no one can condemn the saint for failing to keep the letter of the Law of Moses.

He who has died to the world and is bringing forth fruit through union with Christ need not look back to a lesser covenant. He is without condemnation because the living Christ is justifying him. Yet he is not to despise his brother who does not have this understanding or faith.

Let not the one who is keeping the ordinances of Moses despise the believer who trusts in the Lord Jesus alone for his salvation, and let not the one who observes none of the ordinances despise his brother or sister who believes the observance to be necessary.

Are the Ten Commandments binding on the Christian?

No, in the sense he is under a superior covenant.

Yes, in the sense that as Christ is formed in him he keeps the eternal moral law of God to an exceedingly greater degree than is possible to the sincere believer who is seeking to go back and observe the letter of the Law.

Let us repeat: there is no sin in observing the several statutes and ordinances of the Law of Moses. Let the believer in Christ observe the Passover, the Sabbath, circumcision, bar mitzvah, Succot, the mikvah cleansing, or whatever else he or she desires to do before the Lord. Let him practice these according to the Scripture and rejoice before the Lord.

The believer also must keep in mind that all such ceremonies are pointing toward the day when Christ is formed in the believer. It is the forming of Christ, the new creation, that is the new covenant and the salvation of the Lord. All else is temporary and a scaffolding that will be done away when we come to the measure of the stature of the fullness of Christ. (from The Christian and the Ten Commandments)