Allow me to refer you to the New Testament epistle to the Hebrews. It addresses this very question, especially chapters 7-9.
The covenant with Moses is already made and most religions hold that you cannot intercede with the Dead for a new covenant.
God made many covenants in the Old Testament, but I assume you are speaking about the "New Covenant" vs the "Old Covenant" which God gave Israel through Moses at Mount Sinai. The "New Covenant" or second was mentioned in the Old Testament several times as a covenant which was yet future. The "New Covenant" started in the New Testament when Jesus Christ died on the cross of Calvary, was buried, and was resurrected the third day. The 'Old Covenant" was by Law and the "New Covenant" was by grace.
Jesus
No. Jesus is the New Testament Moses is the Old Testament
Jesus' death opened a new covenant with God.
No he did not , Jesus died in the New testament time . Moses was in the Egyptian era and Jesus was in the Roman era.
No Jesus did not convert. The Old Testament tells us of a new covenant that God was giving to the Jewish people in "time to come". When Jesus (the Son of God) came to earth in human form that "time had come" Jesus simply instituted the new covenant. It was the Jewish people who failed to recognize the Messiah and follow Him into the new covenant.
The old covenant, found in the Old Testament, was based on the laws given to the Israelites through Moses. The new covenant, established through Jesus in the New Testament, emphasizes grace, forgiveness, and personal relationship with God rather than adherence to strict laws and rituals. Jesus's sacrifice on the cross served as the foundation for the new covenant, offering salvation to all who believe in Him.
Yes, and the covenant is in his blood, as the Scripture says in Hebrews 12 -".22 But ye are come -------- 24. to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than [that of] Abel.
The promise of the New Covenant has been given to the remnant of the Jewish nation. For all intents and purposes the New Covenant has been received by the believers in Jesus Christ.
In Christianity, there are several covenants that God made with humanity throughout the Bible. Some of the most notable covenants include the covenant with Noah (Genesis 9), the covenant with Abraham (Genesis 12), the covenant with Moses (Exodus 19), and the new covenant through Jesus Christ (Luke 22). Each covenant established a particular relationship between God and his people.
If you view the New Covenant as a legal document proposing a law then that law has to take effect from a certain date. Jesus did this when He said at the Last Supper "this cup which is poured out for you is the new covenant in my blood." (Luke Ch.22) So the New Covenant came into effect when the cup was poured out at the Last Supper. The new covenant is not a mere renewal of the earlier covenant that the Israelites broke. No, indeed! For the apostle Paul writes to the Christians at Rome, saying: "You are not under law but under undeserved kindness." (Romans 6:14) It is really a new covenant, and it was to be expected that it would be a better one, for the Almighty God Jehovah is able to improve matters with regard to those whom he admits into the new covenant. For one thing, he raised up a better mediator, or go-between, in establishing the new covenant. This Mediator was no imperfect, sin-infected man like the prophet Moses. 8 The Law covenant mediated by means of the prophet Moses was good in itself. However, that covenant provided for the sacrifice of animals whose blood could never wash away human sins. So for Jehovah God to set up a better covenant, there would have to be a better mediator with a better sacrifice. This all-necessary Mediator proved to be Jesus Christ. Pointing out the superiority of this Mediator as compared to the prophet Moses, the Bible gives us the following explanation: "But now Jesus has obtained a more excellent public service, so that he is also the mediator of a correspondingly better covenant, which has been legally established upon better promises. . . . In his saying 'a new covenant' he has made the former one obsolete."-Hebrews 8:6, 13. --Excerpt from "Insight on the Scriptures"