Christians are covered under the covenant of Jesus Christ. What does this mean? It means we are saved from eternal destruction if we believe in Jesus Christ:
Romans 10:9 King James Version (KJV)
9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
What does this mean? For example, does it mean that the old testament laws (also known as the ten commandments) are cancelled out? The short answer is: Yes. The ten commandments continue in the Spirit and intent of the law but the letter of the law is cancelled out. How is it cancelled out?
Romans 13:9 King James Version (KJV)
9 For this, Thou shalt not commit adultery, Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and if there be any other commandment, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself.
In effect, if we love our neighbour as we love ourselves, we wouldn’t offend any of the ten commandments. The below passage affirms this further. The letter of the law is dead.
Romans 7:6 King James Version (KJV)
6 But now we are delivered from the law, that being dead wherein we were held; that we should serve in newness of spirit, and not in the oldness of the letter.
What does it mean to serve in the newness of spirit? Firstly, the law has not been destroyed but is now being properly fulfilled:
Galatians 5:14-18 King James Version (KJV)
14 For all the law is fulfilled in one word, even in this; Thou shalt love thy neighbour as thyself.
15 But if ye bite and devour one another, take heed that ye be not consumed one of another.
16 This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.
17 For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.
18 But if ye be led of the Spirit, ye are not under the law.
If we are continually guided by the Spirit, we are not under the law. If we sin unknowingly or accidentally, the grace of God covers us and the Spirit of God guides us back onto the right path.
Romans 6:14 King James Version (KJV)
14 For sin shall not have dominion over you: for ye are not under the law, but under grace.
Wow! Does that mean if we commit any sin, we are forgiven through God’s grace? Technically, this is corrrect but as explained below this is practically impossible. If we are wilfully sinning continually, we are highly unlikely to be under God’s grace.