The New Covenant of Jesus Christ is the fulfillment of the Old Covenant promises. Jesus fulfills the moral law and its demand which cannot be done by sinful man. Jesus in his sinless life lived Gods laws and by his death he took the wrath of God and the laws demands of justice. The resurrection of Jesus Christ brought a new and better way for Jesus Christ is the end of the law for righteousness the Bible tell us. Jesus Christ is now the way to eternal life and not by trying to keep the law.
The Old Testament contained types and shadows, which reveal and lead to Jesus Christ. Jesus is the fulfillment of all the righteous requirements of the law. Jesus has come not to abolish. kataluô- “destroy,” “demolish,” “dismantle” but to Fulfill and complete the promise of God to send the Messiah that would take away sins.
For they being ignorant of God’s righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God. For Christ is the end of the law for righteousness to every one that believeth. Romans 10:3,4
During Jesus Christ’s life the sacrifices in the Temple in Jerusalem were still valid. The law (Torah) was also still valid at that time. But after his death and resurrection the sacrificial system became obsolete and Jesus became the Christians’ righteousness without the deeds of the law. Jesus’ righteousness became our salvation for his righteousness was imputed (accredited on our behalf) to us by faith in Christ and not by any good deeds or moral lifestyles on our part. (Which if we have any are simply not good enough for the law demands absolute perfection) Once for all Jesus became the sacrifice for sins.
And therefore it was imputed to him (Abraham) for righteousness. Now it was not written for his sake alone, that it was imputed to him; But for us also, to whom it shall be imputed, if we believe on him that raised up Jesus our Lord from the dead; Who was delivered for our offences, and was raised again for our justification. Romans 4:22-25
During the Lord’s life time on earth the law was still valid but at the cross Jesus said…”It is finished” …completed…done…fulfilled. From that time on there was a transition from the Old Covenant to the New Covenant and those who are in Jesus Christ are in his righteousness, and declared holy for he has chosen them out of the world to be his own.
Ye have not chosen me, but I have chosen you, and ordained you, that ye should go and bring forth fruit, and [that] your fruit should remain: that whatsoever ye shall ask of the Father in my name, he may give it you. John 15:16
For it is evident that our Lord sprang out of Juda; of which tribe Moses spake nothing concerning priesthood. And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another priest, Who is made, not after the law of a carnal commandment, but after the power of an endless life. For he testifieth, Thou art a priest for ever after the order of Melchisedec. For there is verily a disannulling of the commandment going before for the weakness and unprofitableness thereof. For the law made nothing perfect, but the bringing in of a better hope did; by the which we draw nigh unto God. And inasmuch as not without an oath he was made priest: (For those priests were made without an oath; but this with an oath by him that said unto him, The Lord sware and will not repent, Thou art a priest for ever after the order of Melchisedec:) By so much was Jesus made a surety of a better testament. Hebrews 7:14-22
Jesus has fulfilled the entire Old Testament. Jesus Christ now supersedes the Old Testament law. All the promises of God are in Christ for he is the fulfillment of the Old Testament. The Old Testament laws remain for one purpose and that is to convict man of sin and lead them to faith in Jesus Christ.
On the cross Jesus said “It is finished!” And He bowed His head and gave up His spirit. John 19:30
After the resurrection: “For Christ is the END OF THE LAW for righteousness to everyone who believes.” ROMANS 10:4
But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up. 2 Peter 3:10